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If 2 sin theta=a+1/a, a is real, then th...

If `2 sin theta=a+1/a`, a is real, then the solution set for a is :

A

`a=1`

B

`a= -1`

C

`a= +-1`

D

all real values of a.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
  1. If tan x=b/a, then the value of a cos 2x+b sin 2x is :

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  2. If sin 5theta = cos 4theta where 5theta and 4theta are acute angles, f...

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  3. If 2 sin theta=a+1/a, a is real, then the solution set for a is :

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  4. The maximum value of a cos x + b sin x is :

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  5. If in a DeltaABC, sin A =sin^(2) B and 2 cos ^(2)A=3 B, then the Delta...

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  6. If the angle opf a triangle are in the ratio 1:2:3, then show that the...

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  7. If in a triangle, a/(cosA)= b/(cos B) =c/(cos C), then the triangle is...

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  8. Let the angles A, B, C of triangle ABC be in A.P. and let b:c= sqrt3:s...

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  9. The period of sin 2 theta is :

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

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

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

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

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

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

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

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

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

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

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

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