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A N EXCEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
- Prove that cos^2 2x-cos^2 6x=sin4x sin8x
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- prove the following sin2x+2sin4x+sin6x=4cos^2xsin4x
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- Prove that cot4x(sin5x+sin3x)=cotx(sin5x-sin3x)
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- Prove that (cos9x —cos5x)/(sin17x-sin3x)=(-sin2x)/(cos10x).
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- Prove that (sin5x+sin3x)/(cos5x+cos3x)=tan4x
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- Prove that (sinx-siny)/(cosx+cosy)=tan(x-y)/2
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- Prove that (sinx+sin3x)/(cosx+cos3x)=tan2x
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- prove the following (sinx-sin3x)/(sin^2x-cos^2x)=2sinx
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- prove the following (cos4x+cos3x+cos2x)/(sin4x+sin3x+sin2x)=cot3x
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- Prove that cotx cot2x -cot2xcot3x-cot3xcotx=1
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- Prove that tan4x=(4tanx(1-tan^2x))/(1-6tan^2x+tan^4x)
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- Prove that 1-8sin^2Acos^2A=cos4A
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- Prove that cos6x=32cos^6x-48cos^4x+18cos^2x-1
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- Suppose that costheta=-1/2 and theta is in the 2nd quadrant.Fill in th...
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- Suppose that costheta=-1/2 and theta is in the 2nd quadrant prove tha...
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- Match the following:
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- Nikolas is asked to prove that cos^2 x+cos^4 x=1 if sinx+sin^2x=1 He p...
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- Given that three numbers a,b,c are in G.P.If b^2=ac Prove that cot^2 3...
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- Match the following:
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- Prove that sin105^@+cos105^@=cos45^@
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