` (cos 6 theta + 6 cos 4 theta + 15 cos 2 theta + 10) / (cos 5 theta + 5 cos 3 theta + 10 cos theta)`

4 cos 6 theta cos 4 theta cos 2 theta =

1+ cos 2 theta + cos 4 theta + cos 6 theta =

Prove that: (cos6 theta+6cos4 theta+15cos2 theta+10)/(cos5 theta+5cos3 theta+10cos theta)=2cos theta

Find the value of (cos6 theta+6cos4 theta+15cos2 theta+10)/(cos5 theta+5cos theta+10cos theta)

What is the value of [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta ? [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta का मान क्या है?

Prove that 16 cos ^(5) theta - 20 cos ^(3) theta + 5 cos theta = cos 5 theta.

Show that, 32 sin^(6) theta = 10 - 15 cos 2 theta + 6 cos 4 theta - cos 6 theta

IF 11 theta = pi then cos theta . cos 2 theta . cos 3 theta cos 4 theta . Cos 5 theta is

((cos theta - cos 3 theta ) ( sin 8 theta + sin 2 theta ))/(( sin 5 theta - sin theta )( cos 4 theta - cos 6 theta ))=