Question

1. Evaluate the following:
() sin 60° cos 30° + sin 30° cos 60°​

Answer 1

Answer:

1

Explanation:

it is in the form of sinAcosB + cosAsinB = sin(A+B)

so the answer is sin(60+30)

i.e. sin 90

sin 90 = 1

Answer 2

Answer:

Sin60°cos30° + sin30°cos60° =1

Explanation:

Sin60°cos30° + sin 30°cos 60°

=Sqrt(3)/2*sqrt(3)/2+(1/2)(1/2)

= 3/4+1/4=4/4=1