Question

if a=Sin A and b = cosA, prove that a²+b²=1 if sin A +sin ² A =1 prove that cos² A+cos² A=1.

​

Answer 1

Answer:

sinA+

sin 2

1⇒ sinA= 1−

sin 2

(sinA)

2

= (cos

2

A)

2

⇒

sin 2

cos 4

1−

cos 2

cos 4

cos 2

cos 4

1