1+.^nC_1 cos theta + .^nC_2 cos 2theta+….+.^nC_n cos n theta बराबर है | 12 | सम्मिश्र संख्यायें ...

If 1+^(n)C_(1)cos theta+^(n)C_(2)cos2 theta+.......+^(n)C_(n) equals

cos theta+cos2 theta+cos3 theta+......+cos(n-1)theta+cos n theta=

Prove that sin^(2n)theta + cos^(2n)theta le 1 for all theta and n ge 1 .

If 5 cos theta -12 sin theta =0 , the value of (2 sin theta +cos theta )/(cos theta - sin theta ) यदि 5 cos theta -12 sin theta =0 , है, तो (2 sin theta +cos theta )/(cos theta - sin theta ) का मान ज्ञात करें |

For all n in N, cos theta cos 2theta cos 4theta ....cos2^(n-1)theta equals to

Prove that cos theta* cos 2theta* cos2^(2)theta * cos2^(3)theta x... cos 2^(n-1) theta = 1/2^(n) , when theta = pi/(2^(n)+1) .

(sin theta_ (1) + i cos theta_ (1)) (cos theta_ (2) + i sin theta_ (2)) ...... (sin theta_ (n) + i cos theta_ (n)) = a + ib, a ^ (2) + b ^ (2) =

If 2 sin theta=5 cos theta , then (sin theta+cos theta)/(sin theta-cos theta) is equal to: यदि 2 sin theta=5 cos theta है, तो (sin theta+cos theta)/(sin theta-cos theta) का मान किसके बराबर होगा ?