Question

verify the following equalities.
(1)sin² 60° + cos² 60°=1
(2) 1+tan² 30° = sec² 30°
(3) cos 90° = 1-2sin² 45° = 2cos² 45°-1
(4). sin 30°cos 60°+cos 30°sin 60°= sin 90°​

Answer 1

Answer:

these are the simple mathematical eqns

Answer 2

Answer:

1. LHS

=sin square 60°+ cos square 60°

( substituting values of sin 60 and

cos 6

=(√3/2) square+(1/2) square

=3/4+1/4

=4/4

=1=RHS