sin m theta+sin n theta=0

5. sin m theta=sin n theta

cos m theta-sin n theta=0

If : 0 lt theta lt pi/2 and sin 7theta + sin 4 theta + sin theta=0 , then : theta =

If cos m theta = sin n theta , then theta =

lim_(theta rarr 0) (sin 3 theta . sin 4 theta)/(theta . sin 5 theta) =

cos m theta=sin n theta then theta=

If sin 6 theta + sin 4theta + sin 2theta= 0 , then general value of theta is (n is integer)

Show that if A = [[cos theta, sin theta],[-sin theta, cos theta]] , then A^n = [[cos n theta, sin n theta],[-sin n theta, cos n theta]]