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Prove that sin 6^@ sin 42^@sin 66^@sin 7...

Prove that `sin 6^@ sin 42^@sin 66^@sin 78^@=1/16`

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PATHFINDER-TRIGONOMETRIC RATIOS AND IDENTITIES-QUESTION BANK
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  2. Find the maximum and minimum value of cos^2theta -6 sin theta .cos the...

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  3. Prove that sin 6^@ sin 42^@sin 66^@sin 78^@=1/16

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  4. if 0ltalpha,beta,gamma lt(pi/2) prove that sin alpha+sin beta+sin gamm...

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  7. If sectheta=sqrt2 and (3pi)/2ltthetalt2pi. Then the value of (1+tanthe...

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  14. If alpha+beta =(pi/2) and beta+gamma=alpha, then the tanalpha equals:

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