trigonometry question

Find all the angles between 0 and 2π for which 3 sin x = 4 cos (x + 2)

Hi,

Begin by considering the result of cos (A + B).

Cheers,
Wen Shih

... remembering that "2" is in radian.

Looks very much like question 2(d) (Miscellaneous Exercise 13, p. 297) in Ho Soo Thong's Panpac Additional Mathematics.

Sincerely,

CKLee

Free additional mathematics stuff available at http://ascklee.org/.