Question

sin30 cos 60+sin 60 cos 30

Answer 1

use Sin(a+b)=sin(90) =1

Answer 2

sin(a+b)=sin a cos b + cos a sin b where a=30, b=60

Answer 3

sinx cosy + siny cosx=sin(x+y)
so sin(30+60)=sin90=1

Answer 4

;)

Answer 5

ok thanks :)

Answer 6

;) yw