hey all i just encountered another trig problem. Can someone help me?
Questions are.
1.If sin a = 3/5, 0* < a < 90* and sin b = 5/13, 90* < b < 180*, find exact values of
i) sin 2a
ii) cos (a-b)
2. Simplify sinAcosAcos2A.
My first instinct for this problem is 1/2 sin2Acos2A. Is that...