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Prove that sectheta+costheta can never b...

Prove that `sectheta+costheta` can never be equal to `(3)/(2)`.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
  1. Which of the six t-ratios are positive for the angle : -405^@ ?

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  2. If sin theta= -1/sqrt2 and tan theta=1, find the quadrant in which the...

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  3. Prove that sectheta+costheta can never be equal to (3)/(2).

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  4. Prove that : cosec^2 theta+ sin^2 theta can never be less than 2.

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  5. Is the equation 2 cos^2 theta + cos theta-6 = 0 possible ?

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  6. Is the equation 2 sin^2 theta -cos theta+ 4 = 0 possible ?

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  7. Find the values of the remaining functions in the following problem : ...

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  8. Find the values of other five trignometrtic functions in each of the f...

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  9. Find the values of the remaining functions in the following problem : ...

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  10. Find the values of the remaining functions in the following problem : ...

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  11. Find the values of the remaining functions in the following problem : ...

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  12. Find the values of the remaining functions in the following problem : ...

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  13. Find the values of the remaining functions in the following problem : ...

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  14. Find the values of the remaining functions in the following problem : ...

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  15. Find the values of the remaining functions in the following problem : ...

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  16. If cos A=21/29 and A lies in the fourth quadrant, find sin A and tan A...

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  17. If sin A=21/29 and A lies in the second quadrant, find sec A + tan A=(...

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  18. If sin theta sec theta = -1 and theta lies in the second quadrant, f...

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  19. If cos theta cosec theta = -1 and theta lies in the fourth quadrant, ...

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  20. If sinA :cosA :: 8: 15, find sin A and cos A.

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