Question

If sin A = 1

2

then find cos 2A, sin 2A and tan 2A.Also verify that sin2

2A +cos2

2A = 1
​

Answer 1

Step-by-step explanation:

if sinA=1/2 then; sin ² + cos²=1

(sin1/2)²+cos²=1

cos²=3/4

cos=√3/2

so;

sin2A=2sin cos

sin2A=2*1/2*√3/2

sin2A=√3/2 Ans

similar find

Sin2A & Cos2A