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Prove that,If " "15 theta = pi, "show th...

Prove that,`If " "15 theta = pi, "show that," cos theta cos2 theta cos3theta cos 4theta cos5 theta cos6theta cos7theta =1/2^(7)`

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If 13theta=pi ,show that costhetacos2theta cos3theta cos4theta cos5theta cos6theta=2^-6

4costheta cos 2theta cos3theta - 2cos 4theta=1

If 13 theta =pi , " prove that " cos theta cos 2theta cos3 theta cos4theta cos5 theta cos6 theta =1/2^(6)

If 13theta =pi " show that"cos 3 theta + cos 5 theta + 2 cos theta cos 9theta = 0

cos 4theta = cos 3theta - cos2theta

sin4theta cos 2theta = cos5theta sin theta

if 13theta=pi ,then show that cos3theta+cos5theta+2costheta.cos9theta=0

Prove that (cot theta -cos theta )/( cot theta +cos theta ) =(cos ec theta -1)/( cosec theta +1)

Show that (1)/( cos theta ) -cos theta =tan theta .sin theta

If sin2 theta = cos 3 theta then theta =

CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS OF MULTIPLE ANGLES-Long Answer Type Questions
  1. Prove that,"cos" pi/11 "cos" (2pi)/11 "cos" (3pi)/11 "cos" (4pi)/11 "c...

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  2. Prove that,If" " theta = (2pi)/7, " show that," sec theta + sec2 theta...

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  3. Prove that,If " "15 theta = pi, "show that," cos theta cos2 theta cos3...

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  4. If" " n tan alpha = (n+1) tan beta " then show that", tan (alpha - bet...

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  5. If tan theta = cos2 alpha tan phi, prove that tan (phi - theta) = (ta...

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  6. If tan theta = sec 2 alpha, "show that", sin 2 theta = (1-tan^(4) alph...

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  7. Prove that,8 cos^(4) theta = 3 + 4 cos 2 theta + cos 4 theta

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  8. Prove that,8 sin^(4) theta = 3 - 4 cos 2 theta + cos 4 theta

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  9. Prove that,64cos^(3) theta sin^(4) theta = cos 7 theta - cos 5 theta -...

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  10. Prove that,sin^(2)A cos^(4) A = 1/16 + 1/32 cos2A - 1/16 cos 4 A - 1/3...

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  11. If tan theta = ( tan alpha - tan beta)/(1-tan alpha tan beta),"show th...

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  12. If " "alpha " and " beta " are positive acute angles and " cos 2 alpha...

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  13. "If " (tan x)/(tan y) = (1 + cos^(2) x)/(1 + sin^(2) x ) " show that "...

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  14. If sin theta + sin 2 theta = a " and " cos theta + cos 2 theta = b, "...

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  15. If theta = pi/(2^(n) + 1), "show that",2^(n) cos theta cos 2 theta cos...

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  16. Prove that, (2 cos theta - 1)(2 cos 2 theta-1)(2 cos2^(2) theta-1)...(...

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  17. If x-1/x = 2i sin theta, "show that", x^(4)-1/x^(4)=2i sin 4 theta.

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  18. Show that,(x tan alpha + y cot alpha)( x cot alpha + y tan alpha) = (x...

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  19. If u = (1 + cos theta) (1+ cos2 theta) - sin theta sin 2theta, v = s...

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  20. Eliminate theta : x = a ( cos theta + cos 2 theta), y = b ( sin theta ...

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