" 2."quad " If "theta=(pi)/(21)," Then "(sin23 theta-sin7 theta)/(sin2 theta+sin14 theta)=

If theta = (pi)/(21) , then (sin23 theta-sin 7 theta)/( sin2 theta + sin 14 theta)=

If theta = (pi)/(21) , then show that (sin 23 theta - sin 7 theta)/(sin 2 theta + sin 14 theta) = -1 .

If" " 0 < theta < pi/2, " then show that " sin theta sin 2 theta sin 3 theta le 9/16

If 3sin2 theta=2sin3 theta and 0

sin3 theta=4sin theta sin2 theta sin4 theta in0<=theta<=pi has

(2sin theta-sin2 theta)/(2sin theta+sin2 theta)=tan^(2)((theta)/(2))

Prove that sin (theta)/(2) sin"" (7 theta)/(2) + sin ""(3theta)/(2) sin ""(11 theta)/(2) = sin 2theta sin5 theta .

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

sin""(theta )/(2)* sin""(7 theta )/(2) + sin""(3theta )/(2) * sin""(11 theta )/(2) - sin 2 theta sin 5 theta =