Question

Difference between 2 sin a and sin 2a​

Answer 1

2SinA means 2 times the sinA

and Sin²A means the square if SinA

for example :-

if sinA = 30°

then,

2SinA = 2×1/2 = 1

And Sin²A = (1/2)² = 1/4

here is your answer

Answer 2

Answer:

2sinA means that 2 times the value of sin A.

However, it's totally different from sin 2A.

Sin 2A Means that the value of x is doubled that is sin of two times x.

Let's take x = 45°

So, 2 sin 45 = 2*1/√2 = √2

And,

sin 2A = sin 90° = 1.

So you can clearly see that 2 sin A is not equal to sin 2A.

sin 2A = 2 sin A cos A