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Prove that: tantheta.tan(60^0-theta).tan...

Prove that: `tantheta.tan(60^0-theta).tan(60^0+theta)=tan3thetadot.'

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  3. Prove that: tantheta.tan(60^0-theta).tan(60^0+theta)=tan3thetadot.'

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  4. Prove that: sin(B-C)cos(A-D) + sin(C-A) cos (B-D) + sin(A-B) cos(C-...

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  7. Prove that: ((cosA+cos B)/(sinA-sinB))^n+((sinA+sinB)/(cosA-cosB))^n={...

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  8. If sintheta=n"sin"(theta+2alpha) , prove that tan(theta+alpha)=(1+n)/...

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  10. Prove that: ("cos"8Acos5A-cos12 Acos9A)/("sin"8Acos5A+cos12 Asin9A)=ta...

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  11. Prove that: (sinA+sin3A+sin5A+sin7A)/(cosA+cos3A+cos5A+cos7A)=tan4A

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  12. Prove that: 1+cos2x+cos4x+cos6x=4cosxcos2xcos3x

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  13. Prove that: cos18^0-sin18^0 = sqrt(2)sin27^0

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  14. Express each of the following as a product: (i) sin4theta+sin2theta ...

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  15. If (sin(theta+alpha))/(cos(theta-alpha))=(1-m)/(1+m) , prove that tan(...

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  16. If sintheta+sinphi=sqrt3(cosphi-costheta)) , prove that sin3theta+sin...

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  17. Convert each of the following products into the sum or difference of ...

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  18. Convert each of the following products into the sum or difference of ...

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  19. Convert each of the following products into the sum or difference of ...

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  20. Convert each of the following products into the sum or difference of ...

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