error

answers: 1

Register to add an answer

Answer:

Both sin (2A) and cos (2A) are derived from the double angle formula for the cosine: cos (2A) = cos2(A) − sin2(A) = cos2(A) − (1 − cos2A) = 2cos2(A) − 1. So, . If we now replace A by (1/2)A, and take the square root we get: .

219

Malbine

For answers need to register.

Contacts

Expert in study