Home
Class 12
MATHS
If r=[2phi+cos^2(2phi+pi/4)]^(1//2), the...

If `r=[2phi+cos^2(2phi+pi/4)]^(1//2)`, then `dr//dphi` at `phi=pi//4`

A

`2((1)/(pi+1))^(1//2)`

B

`2((2)/(pi+1))^(-1//2)`

C

`2((1)/(pi+1))^(-1//2)`

D

`2((2)/(pi+1))^(1//2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

If r=[2 phi+cos^(2)(2 phi+(pi)/(4))]^(1/2), then dr/d phi at phi=pi/4

If phi(x)=phi'(x) and phi(1)=2, then phi(3) equals

If latus rectum of ellipse x^(2)tan^(2)phi+y^(2)sec^(2)phi=1 is 1/2, then the value of phi where phi in(0,pi) is

int(2sin2 phi-cos phi)/(6-cos^(2)phi-4sin phi)d phi

If 0

If 0

If A = [[cos^2theta, costhetasintheta],[costhetasintheta, sin^2theta]] B= [[cos^2phi, cosphisinphi], [cosphisinphi, sin^2phi]] and theta - phi = (2n+1)(pi)/2 Find AB.

If 3(cot^2 phi-cos^2 phi)=cos^2 phi, 0^@ < phi < 90^@ , then the value of (tan^2 phi +cosec^2 phi + sin^2 phi) is: