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Recent questions tagged trigonometric-identities

For a $\Delta ABC$ it is given that : $\cos A+\cos B+\cos C=\large\frac{3}{2}$.What type of triangle is $ABC$?

asked Nov 19, 2013 by sreemathi.v

1 answer

Find the value of $\tan\large\frac{\pi}{8}$

asked Oct 10, 2013 by sreemathi.v

1 answer

If $\sin x+\sin^2x=1$ then $\cos^8x+2\cos^6x+\cos^4x$ is equal to

asked Oct 8, 2013 by sreemathi.v

1 answer

If $\sin x+\sin^2x=1$ then value of $\cos^2x+\cos^4x$ is equal to

asked Oct 8, 2013 by sreemathi.v

1 answer

$\cos 2^3\large\frac{\pi}{10}$$\cos 2^4\large\frac{\pi}{10}$$\cos 2^5\large\frac{\pi}{10}........$$\cos 2^{10}\large\frac{\pi}{10}$ is equal to

asked Oct 8, 2013 by sreemathi.v

1 answer

If $\tan^2\theta=2\tan^2\phi+1$ then $\cos 2\theta+\sin^2\phi$ is equal to

asked Oct 4, 2013 by sreemathi.v

1 answer

The value of $\large\frac{\cos\theta}{1+\sin\theta}$ is equal to

asked Oct 4, 2013 by sreemathi.v

1 answer

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