2θ, 3θ के फार्मूलों का Complex Question में उपयोग

Trigonometric identities with proOF || Multiplicative inverse || Sin2θ + cos2θ =1 || sec2θ -tan2θ =1 || cosec2θ -cot2θ =1 || Exemplar questions discussion

The number of different AP's whose first three terms are cos θ , (cos 2 θ)/ 2 , cos 3 θ is/are Question Type: single correct Type [ 1 . ) 0 ] , [ 2 . ) 1 ] , [ 3 . ) 2 ] , [ 4 . ) 3]

Trigonometric ratio OF multiple angles (2θ,3θ,4θ) || sub multiple angles (θ/2 ,θ/4....)