Question

If Cos2 64 +Cos2 A=1 then the angle A is.

Answer 1

Step-by-step explanation:

Given:

`cos A+cos^2 A=1`

`⇒ 1- cos^2 A= cos A`

So,

`sin^2 A+sin^4 A`

`= sin^2 A+sin^2 A sin^2 A`

`= sin^2 A+(1-cos^2 A)(1-cos^2 A)`

`=sin^2 A+cos A cos A`

`=sin^2 A+cos^2 A`

`=1`

Answer 2

Answer:

Step-by-step explanation:

A=24

.