Question

if sin(A+B)=sinA.CosB+cosAsinB,then find the value of sin75°

Answer 1

put A = 30 and B = 45
Therefore sin 75
= sin 30 cos 45 + sin 45 cos 30
Which is equal to
$\frac{1}{2} \times \frac{1}{ \sqrt{2} } + \frac{1}{ \sqrt{2} } \times \frac{ \sqrt{3} }{2} = \frac{ \sqrt{3} + 1}{2 \sqrt{2} }$
Hope this helps.

Answer 2

Answer:

hope it helps somebody