1. Determine identity of cos2x/sinx ?
2. Determine exact value of expression sin(sin^-1(1/3) + tan^-1(-8)?
3 if theta = 3/5 where < theta < pi, determine exact values of sin20 and cos 20?
4 Determine angle theta which makes statement true cos(3theta - 41)=sin (theta + 15)
5. simplify cosx(2sinx + cosx)-sin^2 x
6. Write following as algebraic expression in U where U>0 csc(arcsec U/3)