Question

Pls help me out with this Question!​

Answer 1

Answer:

sin (75) = sin (45+30) = sin 45. cos 30 + cos 45. sin 30

1/√2× √3/2 + 1/√ 2 × 1/2

= √3+1 / 2√2

sin(75) = sin (90- 15) = cos 15 = √3+1 / 2√2