Question

sin thita .cos(90-thita)+cos thita sin (90-1) is​

Answer 1

Answer:

sin thita .cos(90-thita)+cos thita sin (90-1)

=sin thita×sin thita+cos thita×cos thita (sin (90-1)=sin thita)

=sin^2 thita+cos^2thita

=1 (sin^2 thita+cos^2thita=1).