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Prove the following : cot 4 theta(sin ...

Prove the following :
`cot 4 theta(sin 5 theta+ sin 3 theta)=cot theta(sin 5 theta-sin 3 theta)`.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
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  3. Prove the following : cot 4 theta(sin 5 theta+ sin 3 theta)=cot thet...

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  4. Prove the following : cos 3 theta+ cos 5 theta+ cos 7 theta+ cos 9 t...

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  5. Prove the following: sin2 x + 2 sin 4x + sin 6x = 4 cos^2 x sin 4x

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  7. Prove the following : cos 7 theta + cos 5 theta + cos 3 theta +cos t...

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  11. Prove the following: (cos4x + cos3x + cos2x)/(sin4x + sin 3x + sin 2x)...

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  12. Prove the following : (sin 5x -2sin 3x+sinx)/(cos 5x-cos x)= tan x.

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  13. Prove that: ((sin 7x + sin 5x) + (sin 9x + sin 3x))/((cos7x + cos5x) +...

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  14. Prove the following: (sin x -sin 3x)/(sin^2 x -cos^2 x)= 2sinx

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  15. Prove that: (cos x + cos y)^2 + (sin x -sin y)^2 = 4 cos^2frac (x+y)(2...

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  17. Prove the following: cot 4x (sin 5x + sin 3x) = cot x (sin 5x -sin 3x)

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  18. If alpha+beta=pi/2, then the maximum value of cosalpha cos beta is:

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  19. If cos (theta + 2alpha) = m cos theta, prove that : cot alpha = (1+m)/...

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