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Recent questions tagged p90
ASK
Two sides of a tringle have length $12$m and $15$m. The angle between them is increasing at a rate of $2^{\circ}/min.$ How fast is the length of third side increasing when the angle between the sides of fixe is $60^{\circ}$?
tnstate
class12
bookproblem
ch5
sec-1
exercise5-1
p90
q8
asked
May 1, 2013
by
poojasapani_1
1
answer
At noon, ship $A$ is $100$ km west of ship $B$. Ship $A$ is sailing east at $35$ km/hr and ship $B$ is sailing north at $25$km/hr. How fast is the distance between the ships changing at $4.00$pm.
tnstate
class12
bookproblem
ch5
sec-1
exercise5-1
p90
q6
asked
May 1, 2013
by
poojasapani_1
1
answer
The altitude of a triangle is increasing at a rate of $1\; cm/min$ while the area of the triangle is increasing at a rate of $2 \;cm^{2}/min$. At what rate is the base of the triangle changing when the altitude is $10$ cm and the area is $100\;cm^{2}$
tnstate
class12
bookproblem
ch5
sec-1
exercise5-1
p90
q5
asked
May 1, 2013
by
poojasapani_1
1
answer
Newton's law of cooling is given by $\theta=\theta_0^{\circ}e^{-kt},$ where the excess of temperature at zero time is $0^{\circ}_{\circ}C $ and at time $t$ seconds is $\theta ^{\circ}C $. Determine the rate of change of temperature after $40 s,$ given that $\theta_{\cdot}=16^{\circ}C $ and $k=-0.03.\qquad (e^{1.2}=3.3201)$
tnstate
class12
bookproblem
ch5
sec-1
exercise5-1
p90
q4
asked
Apr 30, 2013
by
poojasapani_1
1
answer
If $A, B$ are symmetric matrices of the same order, then $AB - BA$ is
cbse
class12
bookproblem
ch3
sec3
q11
p90
easy
shortanswer
sec-a
math
asked
Nov 23, 2012
by
pady_1
1
answer
if $A = \begin{bmatrix} cos\alpha & -sin\alpha \\ sin\alpha & cos\alpha \end{bmatrix} $ then $ A + A' = I, $ if the value of $\alpha$ is
cbse
class12
bookproblem
ch3
sec3
q12
p90
easy
shortanswer
objective
sec-a
math
asked
Nov 23, 2012
by
pady_1
1
answer
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