Introduction to Trigonometry
If sinx+sin2x=1, then the value of cos12x+3cos10x+3cos8x+cos6x−1 is equal to
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Using trigonometric identities 5cosec2θ−5cot2θ−3 expressed as an integer is
Prove that following identities, where the angles involved are acute angles for which the trigonometric ratios as defined: (1−tan2A)/(cot2A−1)=tan2A.
Prove that :(sinA+secA)2+(cosA+cosecA)2=(1+secAcosecA)2.
Express 1+tanx1−tanx in terms of sinx and cosx
Find the value of cos(90o−A) tan(90o−A) sec(90o−A)
Show that: 1−cosA 1+cosA =(secA−1) 2tan2A
Find the value of the following :sin53ocos37o