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Multiple Angle Formulae

Elvauate 1/2+cos theta+sin theta if tan theta/2=2

Asked by Rohit.koshta01 4th March 2018 12:19 PM

Find ∑_(r=0)^7〖tan〗^2   πr/16 (STATEMENT : the sum of r varies from 0 to 7 for t tan^2 pi r/16) Give answer in proper steps.

Asked by acv27joy 18th May 2018 5:47 PM

Show that (1+cos x)3/2(1- cos x)1/2​=sin x(1+cos x)

Asked by soumen_tiku 8th June 2018 11:51 PM

Prove the following identity.

Asked by Anish 16th June 2018 4:42 PM

Evaluate : (1+cos π/8 ) (1+cos 3π/8 ) (1+cos 5π/8 ) (1+cos 7π/8 )

Asked by tps.mjmdr 16th June 2018 5:42 PM

Evaluate : 16cos (2π/15) cos (4π/15) cos (8π/15) cos (16π/15)

Asked by tps.mjmdr 16th June 2018 5:50 PM

If sin ^2A=x then express the values of sin A . sin 2A . sin 3A . sin 4A in terms of x.

Asked by tps.mjmdr 16th June 2018 8:11 PM

Prove that

Asked by Anish 11th July 2018 1:33 PM

(sinø-cosø)^2=1-sin2ø

Asked by abhaysharma2710 15th July 2018 10:09 AM

For any real x find the minimum and maximum value for the expression 3sin^2x +3sinxcosx + 7cos^2x.

Asked by acv27joy 10th December 2018 1:10 PM

sinx1sinx2-cosx1cosx2+1=0 the value of tanx1/2*tanx2/2 is alwya equal to?

Asked by aahnik.mohanty 29th May 2019 8:00 PM

2 tan B + cot B = tan A , show that 2 tan(A-B) = cot B

Asked by agarwalharsh8476 6th August 2019 8:32 PM