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Prove that: sin36^0=(sqrt(10-2sqrt(5)))/...

Prove that: `sin36^0=(sqrt(10-2sqrt(5)))/4` .

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF MULTIPLE AND SUBMULTIPLE ANGLES-All Questions
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  3. Prove that: sin36^0=(sqrt(10-2sqrt(5)))/4 .

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  4. The value of (cos3theta)/(2cos2theta-1) is equal to (a) costheta (b) ...

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  10. To prove (cos5x+cos4x)/(1-2cos3x)=-cos2x-cosx

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  11. If tantheta= t, then tan2theta+sec2theta is equal to (a) (1+t)...

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  12. Prove that: "cot"pi/(24)=sqrt(2)+sqrt(3)+sqrt(4)+sqrt(6)

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  13. (sec8A-1)/(sec4A-1) is equal to (A) (tan2A)/(tan8A) (B) (tan8A)/(t...

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  19. Prove that: "tan"pi/(16)=sqrt(4+2sqrt(2))-(sqrt(2)+1)

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  20. Prove that: "tan"142""(1^0)/2=2+sqrt(2)-sqrt(3)-sqrt(6)

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