Respuesta :
Answer:
A. & A.
Step-by-step explanation:
sin(x) = cos(90-x)
sin(30) = cos(90-30) = 60
sin(60) = cos(90-60) = 30
Answer:
A. cos60° and A. cos30°
Step-by-step explanation:
We know that is A and B are complementary, so
sinA = cosB
sin30° = cos60° and
sin60° = cos30°
So,
sin30°·sin60° = cos60°·cos30°
The product of sin30° and sin60° is same as the product of cos60° and cos30°.