Answer:
Step-by-step explanation:
2 cosA sinB = sin(A + B) − sin(A − B) 2 cosA cosB = cos(A + B) + cos(A − B)
Answer:
(sina)cosb=1/2[sin(a+b)+sin(a-b)]
Step-by-step explanation:
Be sure that when you type your answer, you dont put the parentheses around sina.
You should type sina
