Question

Sin2A=2SinAcosA is true when A


a) 0°
b) 30°
c) 45°​

Answer 1

hi

Answer:

0°

Step-by-step explanation:

2 × sin2(0°) = 2 × 0 = 0

2sin0°cos0° = 2 × 0 × 1 = 0

gud day

Answer 2

Step-by-step explanation:

all cases..

let's check

Sin2×0 = 2 sin0 cos 0

0 =0×1

so it's true when A = 0

sin2×30 = 2sin30 cos30

√3/2 = 1 × √3/2

so it is also valid when A= 30°

Sin2×45 = 2sin45 cos45

1 = 2×1/√2 × 1/√2

1 = √2 ×1/√2

1 = 1

So it is also valid on this case also

answer:

(a) ,(b) and(c)

(all of them)

Hope it helps uh!