Question

cos 18 degree by sin 72 degree value

Answer 1

ITS VERY SIMPLE
GIVEN
cos 18°/sin 72°
we know that sin(90°- x) = cos x
SO, SIN72°=SIN (90°-18°) =COS 18°
SINCE BY DIVIDING WE GET ANSWER '1'

Answer 2

Given : The given mathematical problem is, cos 18° / sin 72°

To find : The answer to the given mathematical problem.

Solution :

We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the answer to the given mathematical problem)

Here, we will be using general trigonometric identities, in order to solve the given mathematical problem.

So,

= cos 18° / sin 72°

= [cos (90° - 72°)] / sin 72°

= sin 72° / sin 72°

= 1

(This will be considered as the final result of the given mathematical problem.)

Used identity :

• cos (90° - θ) = sin θ

Hence, the answer is 1