सिद्ध कीजिए कि : cos.(2pi)/(3)cos.(pi)/(...

सिद्ध कीजिए कि : `cos.(2pi)/(3)cos.(pi)/(4)-sin.(2pi)/(3)sin.(pi)/(4)=(-(sqrt3+1))/(2sqrt2)`

सिद्ध कीजिए कि : cos.(2pi)/(3)cos.(pi)/(4)-sin.(2pi)/(3)sin.(pi)/(4)=(...
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Prove that (i) "sin " (7pi)/(12) " cos " (pi)/(2) - "cos " *(...
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Prove that (i) "cos " ((pi)/(3) +x) =(1)/(2) ( " cos " x - sqrt...
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यदि cos theta = sqrt3/2, "तो सिद्ध करें कि " 3 sin theta - 4 sin^(3) ...
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सिद्ध कीजिए कि : cos.(2pi)/(3)cos.(pi)/(4)-sin.(2pi)/(3)sin.(pi)/(4)=(...
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sin^(-1)x-sin ^(-1)y=(pi)/(3) and cos^(-1) x+ cos ^(-1) y=(2pi)/(3)
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I. Sin^(-1)("sin"(2pi)/3)=(2pi)/3 II. Cos^(-1)("cos"(5pi)/4)=(5pi)/4
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Prove that: sin^2(pi/6)+cos^2(pi/3)-t a n^2pi/4=-1/2
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Evaluate the following: cos(2pi/3)cos(pi/4)-sin(2pi/3)sin(pi/4)
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