Question

If A =45 degree verify that sin 2A =2sinA CosA =2tanA /1+tan^2A

Answer 1

here is your answer mate.....

just putting the values we get...

Sin 90° = 2Sin45°×Cos45° = 2×Tan45°/1+Tan90°

then...

1 = 2√2×1/√2 = 1/2 ×2 = 1

then 1= 2×1/1+1/0 = 0/2 = 0 hence the third one is not equal to the above two .....

hope it helps you.... ml