Recent questions tagged ch3

Prove $\large\frac{\cos 4x+\cos 3x+\cos 2x}{\sin 4x+\sin 3x+\sin 2x}$$=\cot 3x$

asked Apr 17, 2014 by sreemathi.v

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Prove $\large\frac{\sin x-\sin 3x}{\sin^2x-\cos^2x}$$=2\sin x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove $\large\frac{\sin x+\sin 3x}{\cos x+\cos 3x}$$=\tan 2x$

asked Apr 17, 2014 by sreemathi.v

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Prove : $\large\frac{\sin x-\sin y}{\cos x+\cos y}$$=\tan\large\frac{x-y}{2}$

asked Apr 17, 2014 by sreemathi.v

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Prove :$\large\frac{\sin 5x+\sin 3x}{\cos 5x+\cos 3x}$$=\tan 4x$

asked Apr 17, 2014 by sreemathi.v

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Prove : $\large\frac{\cos 9x-\cos 5x}{\sin 17x-\sin 3x}=-\frac{\sin 2x}{\cos 10x}$

asked Apr 17, 2014 by sreemathi.v

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Prove : $\cot 4x(\sin 5x+\sin 3x)=\cot x(\sin 5x-\sin 3x)$

asked Apr 17, 2014 by sreemathi.v

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Prove : $\sin 2x+2\sin 4x+\sin 6x=4\cos^2x\sin 4x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\cos^22x-\cos^26x=\sin 4x.\sin 8x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\sin^26x-\sin^24x=\sin 2x.\sin 10x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\cos(\large\frac{3\pi}{4}$$+x)-\cos(\large\frac{3\pi}{4}$$-x)=-\sqrt 2\sin x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\sin(n+1)x\sin(n+2)x+\cos(n+1)x\cos(n+2)x=\cos x$

asked Apr 17, 2014 by sreemathi.v

1 answer

$\cos (\large\frac{3\pi}{2}+$$x)\cos(2\pi+x)[\cot(\large\frac{3\pi}{2}$$-x)+\cot(2\pi+x)]=1$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\large\frac{\cos(\pi+x)\cos(-x)}{\sin (\pi-x)\cos(\large\frac{\pi}{2}+\normalsize x)}=$$\cot^2x$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove :$\large\frac{\tan(\Large\frac{\pi}{4}\normalsize +x)}{\tan(\Large\frac{\pi}{4}\normalsize -x)}=\big(\large\frac{1+\tan x}{1-\tan x}\big)^2$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\cos(\large\frac{\pi}{4}$$-x)\cos (\large\frac{\pi}{4}$$-y)-\sin(\large\frac{\pi}{4}$$-x)\sin (\large\frac{\pi}{4}$$-y)=\sin (x+y)$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the value : $\tan 15^{\large\circ}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the value :$\sin 75^{\large\circ}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $2\sin ^2\large\frac{3\pi}{4}$$+2\cos^2\large\frac{\pi}{4}$$+2\sec^2\large\frac{\pi}{3}$$=10$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\cot^2\large\frac{\pi}{6}$$+cosec \large\frac{5\pi}{6}$$+3\tan^2\large\frac{\pi}{6}$$=6$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $2\sin^2\large\frac{\pi}{6}+$$cosec ^2\large\frac{7\pi}{6}$$\cos^2\large\frac{\pi}{3}=\large\frac{3}{2}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Prove : $\sin^2\large\frac{\pi}{6}$$+\cos^2\large\frac{\pi}{3}$$-\tan^2\large\frac{\pi}{4}=-\frac{1}{2}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the value of the trigonometric function $\cot(\large\frac{-15\pi}{4})$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the values of the trigonometric function $\sin(-\large\frac{11\pi}{3})$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the values of the trigonometric function $\tan \large\frac{19\pi}{3}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the value of the trigonometric functions $cosec (-1410^{\large\circ})$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the value of the trigonometric function $\sin 765^{\large\circ}$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the values of other five trignometric function $\tan x=\large\frac{-5}{12}$,$x$ lies in the second quadrant

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the values of other five trignometric function $\sec x=\large\frac{13}{5}$,$x$ lies in the fourth quadrant

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the values of other five trignometric function $\cot x=\large\frac{3}{4}$,$x$ lies in the third quadrant

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the values of other five trignometric function $\sin x=\large\frac{3}{5}$,$x$ lies in the second quadrant

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the values of other five trignometric function $\cos x=-\large\frac{1}{2}$,$x$ lies in the third quadrant

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 21cm

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 15cm

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 10cm

asked Apr 16, 2014 by sreemathi.v

1 answer

If in two circles arcs of the same length subtend angles $60^{\large\circ}$ and $75^{\large\circ}$ at the centre,find the ratio of their radii

asked Apr 16, 2014 by sreemathi.v

1 answer

In a circle of diameter 40cm,the length of a chord is 20cm.Find the length of the minor arc of the chord

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the degree measures of the angle subtended at the centre of a circle of radius 100cm by an arc of length 22cm (use $\pi=\large\frac{22}{7})$

asked Apr 16, 2014 by sreemathi.v

1 answer

A wheel makes 360 revolutions in one minute.Through how many radians does it turn in one second?

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the degree measures corresponding to the following radian measures :- $\large\frac{7\pi}{6}$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the degree measures corresponding to the following radian measures :-$\large\frac{5\pi}{3}$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the degree measures corresponding to the following radian measures:-$-4$ radians

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the degree measures corresponding to the following radian measures :-$\large\frac{11}{16}$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the radian measures corresponding to the following degree measures :-$520^{\large\circ}$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the radian measure corresponding to the following degree measure :-$240^{\large\circ}$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the radian measures corresponding to the following degree measures :-$-47^{\large\circ}30'$

asked Apr 16, 2014 by sreemathi.v

1 answer

Find the radian measures corresponding to the following degree measures :-$25^{\large\circ}$

asked Apr 16, 2014 by sreemathi.v

1 answer

The second maturation division of the mammalian ovum occurs

asked Apr 4, 2014 by pady_1

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The testes in humans are situated outside the abdominal cavity inside a pouch called *******. The purpose served is for

asked Apr 4, 2014 by pady_1

1 answer

Which of the following is a mode of reproduction in animals in which embryos develop inside eggs that are retained within the mother's body until they are ready to hatch?

asked Apr 4, 2014 by pady_1

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