Question

Sin 2b =2 sin b is true when b is equal to
a) 90°
b)60°
c)30°
d)0°

Answer 1

Answer:

option (d)

Step-by-step explanation:

sin 90°=1

sin30°=1/2

sin 60°=√3/2

sin 0°=0

Answer 2

Option (d)

The value of B is 0°

Step-by-step explanation:

given sin 2B = 2 sin B

we have to find the value of B

then

$\sin 2B = 2\sin B \\\\\sin 2\theta = 2 \sin\theta\cos\theta\\\\2 \sin B \cos B =2 \sin B$

$\cos B = \frac{2\sin B }{2\sin B}$

$\cos B =1\\\\\cos B = 0\\\\\angle B = 0^\circ$

hence , The value of B is 0°

#Learn more:

Sin^2 (A+B) - sin^2 (A-B) = sin 2A sin 2B

https://brainly.in/question/5015440