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A N EXCEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-QUESTION BANK
- Given that sin18^@=(sqrt5-1)/4 prove thatsin^2 24^@-sin^2 6^@=(sqrt5-1...
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- Express sinA+sin3A and cosA+cos3A in product form
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- Prove that (sinx+sin3x)/(cosx+cos3x)=tan2x
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- If A=30^@ deduce the value of tan60^@
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- Express sintheta+sin3theta and sin5theta+sin7theta in product form
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- Prove that sintheta+sin3theta+sin5theta+sin7theta=4costhetacos2thetasi...
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- Express cos40^@ cos80^@ in sum form
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- Prove that cos20^@ cos40^@ cos80^@=1/8
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- Express sin3A and cos2A in terms of sine function
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- Convert sin5A+sinA into product form and show that sin5A=5sinA-20sin^3...
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- If A=18^@ deduce the value of sin36^@=sqrt(10-2sqrt5)/4
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- Prove that cos^2theta=(1+cos2theta)/2
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- Evaluate cos^2(pi/8)+cos^2((3pi)/8)
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- Evaluate cos^2(pi/8)+cos^2((3pi)/8)+cos^2((5pi)/8)+cos^2((7pi)/8)=2
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- Prove that sinA/(1+cosA)=tan(A/2)
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- Show that tan 15^@ = 2 - sqrt3
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- Given that 1-costheta=2sin^2(theta/2) and 1+costheta=2cos^2(theta/2) p...
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- Given that 1-costheta=2sin^2(theta/2) and 1+costheta=2cos^2(theta/2)de...
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- Writing 4A=2xx2A prove that sin4A=4sinAcos^3A-4cosAsin^3A
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- if sin4A=4sinAcos^3A-4cosAsin^3A Dividing numerator and denominator on...
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