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Prove that (cosA-cosB)^2+(sin A-sin B)^2...

Prove that `(cosA-cosB)^2+(sin A-sin B)^2=4sin^2((A-B)/2)`

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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS-All Questions
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  2. If sin A=3/5,w h e r e0^0ltAlt90^0 , then find the values of sin2A , c...

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  3. Prove that (cosA-cosB)^2+(sin A-sin B)^2=4sin^2((A-B)/2)

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  4. Let f(x)=2 cosec 2x + sec x+cosec x, then the minimum value of f(x) fo...

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  5. If tanalpha=1/7 ,sinbeta=1/sqrt10 prove that alpha+2beta=(pi/4) where ...

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  7. Prove that (1-tan^2(pi/4-A))/(1+tan^2(pi/4-A))=sin2Adot

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  8. If alpha+beta=90^0 , find the maximum and minimum values of sinalphas...

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  9. Find the maximum and minimum value of cos^2theta -6 sin theta .cos the...

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  10. If p(x)=sinx(sin^3x+3)+cosx(cos^3x+4)+(1/2)sin^2 2x+5, then find the ...

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  11. The value of cos e cpi/(18)-4sin((7pi)/(18)) is

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  12. If A+B+C=(3pi)/2, then cos2A +cos2B+cos2C is

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  13. Prove that: (costheta)/(1+sintheta)=tan(pi/4-theta/2)

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