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Given tan 2A = (2 tan A)/(1-tan^2A). If ...

Given `tan 2A = (2 tan A)/(1-tan^2A)`. If `tan 30^@= 1/sqrt3`, verify that `tan 60^@ = sqrt3`.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
  1. If theta = 30^@, verify that tan 2 theta= (2 tan theta)/(1- tan^2 thet...

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  2. If A= 30^@ and B= 60^@, verify that : sin (A + B) = sin A cos B + co...

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  3. Given tan 2A = (2 tan A)/(1-tan^2A). If tan 30^@= 1/sqrt3, verify that...

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  4. Find the value of theta (0^@ le theta le 90^@) satisfying : tan theta+...

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  5. Find the value of theta (0^@ le theta le 90^@) satisfying : 2 sin^2 th...

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  6. Find the value of theta (0^@ le theta le 90^@) satisfying : 2 cos^2 th...

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  7. If sin theta= 21/29, prove that sec theta+ tan theta= 2 1/2 if theta l...

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  8. What will be the value of the expression sec theta+ tan theta and sin ...

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  9. What will be the value of the expression sec theta+ tan theta and sin ...

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  10. If sin(B +C-A)= cos(C+A-B) =tan (A+B-C)=1, find A, B, C which are posi...

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  11. Find the value of : cos 210^@.

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  12. Find the value of : sin 225^@.

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  13. Find the value of : sin 765^@.

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  14. Find the value of : tan 330^@.

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  15. Find the value of : tan frac (19 pi)(3).

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  16. Find the value of : cot (-315^@).

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  17. Find the value of : cot ((-15 pi)/4) .

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  18. Find the value of : sec frac (11 pi)(4).

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  19. Find the value of : cosec (-1410^@).

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  20. Prove that: (cos 135^@ - cos120^@)/(cos 135^@ + cos120^@) =3-2 sqrt2 .

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