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If y = sec^2 theta+ cos^2 theta, theta n...

If `y = sec^2 theta+ cos^2 theta, theta ne 0`, then :

A

y=0

B

`yle2`

C

`yge-2`

D

ygt2.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
  1. Let the angles A, B, C of triangle ABC be in A.P. and let b:c= sqrt3:s...

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  2. The period of sin 2 theta is :

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  3. If y = sec^2 theta+ cos^2 theta, theta ne 0, then :

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  4. The sides BC, CA and AB of a triangle ABC are of lengths a, b and c re...

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  5. The angle of elevation of the top of a hill from a point is alpha. Aft...

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  6. If tan(x/2)=cosec x-sin x, then find the value of tan^(2) (x/2).

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  7. Consider the system of equations in x, y, z as x sin 3 theta-y + z=0, ...

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  8. Prove that cos^(4) .(pi)/(8) + cos^(4).(3pi)/(8)+cos^(4).(5pi)/(8)+c...

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  9. Prove that : "tan"(pi/(4)+1/(2)"cos"^(-1)a/(b))+"tan"(pi/(4)-1/(2)"cos...

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  10. The equation sqrt3 sinx+cos x=4 has:

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  11. The value of cos 15^@ cos 7 1^@/2 sin 7 1^@/2 is:

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  12. The most general values of 'x' for which sin x + cos x =underset( a i...

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  13. If a= 2 sqrt2, b= 6, A = 45^@, then:

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  14. In triangle ABC, if sin Asin B=(ab)/c^2, then the triangle is :

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  15. The value of : (1+cos frac (pi)(6)) (1+cos frac (pi)(3))(1+cos frac (2...

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  16. P=1/2 sin^2 theta+1/3 cos^2 theta, then :

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  17. The smallest value of 5 cos theta+ 12 is :

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  18. Smallest form of 2/(sqrt(2+sqrt(2+sqrt(2+2 cos4x)))) is :

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  19. If 5 cos 2 theta +2 cos^2 (theta/2)+1=0, when (0 ltthetalt pi), then t...

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  20. If aa n db are positive quantities such that a > b , the minimum value...

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