Question

If y=costheta then dy/dtheta where theta=pi

Answer 1

Explanation:

put θ = π ( i.e., 180° )

==> - sin (180°)

==> - ( 0 )

==> 0

Answer 2

AnsWer :

0.

Given :

• y = cos theta.
• theta = π.

Solution :

We have,

$\tt y = Cos \theta.$

# Differentiate w.r.t.theta.

$\tt \longmapsto \dfrac{dy}{d \theta}$

$\tt\longmapsto \dfrac{d \:cos \theta}{d \theta}$

$\tt\longmapsto - (sin \theta)$

Now,

We have, the value of theta ( π )

• Note : π = 180°

$\rule{90}1$

A/Q,

$\tt\longmapsto - (sin \: \pi)$

$\tt\longmapsto - (sin \: 180\degree)$

• Sin( 180° ) = 0.

$\tt \longmapsto - (0)$

$\tt \longmapsto 0.$

Therefore, the value of dy/d theta is 0.