`3 sin 10^@ - 4 sin^3 10^@=`

3sin10^(@)-4sin^(3)10^(@)=

The equation of an FM signal is e = 6 sin (10^(6) t + 4 sin 10^(3) t ) . Then, the modulating frequency is

The equation of an FM signal is e = 6 sin (10^(6) t + 4 sin 10^(3) t ) . Then, the modulating frequency is

1+ cos 10^(@) + cos 20^(@)+ cos 30^(@)= ............... A) 4 cos 5^(@) cos 10^(@) cos 15^(@) B) 4 cos 10^(@) cos 20^(@) cos 30^(@) C) 4 sin 5^(@) sin 10^(@) sin 15^(@) D) 4 sin 10^(@) sin 20^(@) sin 30^(@)

Prove that : sin 10^@ sin 50^@ sin 60^@sin 70^@= sqrt3/16 .

4( cos^(3) 10^(@) + sin^(3) 20^(@))=

Prove the following identities: sin10^(@) sin50^(@) + sin50^(@) sin 250^(@) + sin 250^(@) sin 10^(@) = -3/4

Prove that sin 10^(@) " sin " 50^(@) " sin " 60^(@) " sin " 70^(@) = .(sqrt(3))/(16)

If 0 lt theta lt pi//2 and 2 sin theta = sqrt(3) cos 10^(@) + sin 10^(@) , then theta =