Question

cos15-sin75 find value

Answer 1

Hii dear here is your answer...........
cos15-sin75=?
solution......
15+x=90
x=90-15=75
so 15 can be written as 90-75

cos(90-75)-sin75
as we know cos (90- theta)=sintheta
sin75-sin75=0

hope it helps you......