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If cosx/(1 + cosec x)+ (cosx)/(cosecx -1...

If `cosx/(1 + cosec x)+ (cosx)/(cosecx -1) =2`, which one of the following in one of the value ofx ?

A

`pi/2`

B

`pi/3`

C

`pi/4`

D

`pi/6`

Text Solution

Verified by Experts

The correct Answer is:
C
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LUCENT PUBLICATION-ELEMENTARY TRIGONOMETRIC IDENTITIES -EXERCISE 11A
  1. If sin x cos x = 1//2, then what is the value of sin x - cos x ?

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  2. If tan^2 y cosec^2 x – 1 = tan^2 y, then which one of the following is...

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  3. If cosx/(1 + cosec x)+ (cosx)/(cosecx -1) =2, which one of the followi...

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  4. If sin x + sin y = a and cos x + cos y = b, what is sin x.sin y + cos ...

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  5. If a is an angle in first quadrant such that "cosec"^(4) alpha = 17+"c...

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  6. If x + (1//x) = 2 cos alpha, then what is the value of x^2 + (1//x^2) ...

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  7. If sin theta + cos theta = a and sec theta + "cosec" theta = b, then w...

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  8. Among given values of theta which one satisfies the equation (cos thet...

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  9. If 7 cos^2 theta +3 sin^2 theta =4 and 0 lt theta lt pi//2, what is th...

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  10. What is the value of , [(1-sin^(2)theta)sec^(2)theta +tan^(2)theta](co...

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  11. What is the value of sin^(2) 15^(@) + sin^(2) 20^(@) + sin^(2)25^(@) +...

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  12. What is sqrt((1 + sin theta)/(1 -sintheta)) equal to ?

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  13. If theta^(@) lt theta lt 90^(@) and (sin theta)/(cos theta) + (cos the...

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  14. If sin 3 theta = cos (theta - 2 ^(@)) where 3 theta and (theta - 2 ^(@...

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  15. What is ( sin ^(6) theta - cos ^(6) theta )/( sin ^(2) theta - cos ^(2...

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  16. If sin^(4)x + sin^(2) x =1, then the value of cot^(4)x + cot^(2)x is:

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  17. If x cos theta + y sin theta =2 and x cos theta - y sin theta =0, then...

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  18. Expression sin A (1 + tan A) + cos A(1+ cot A) is equal to:

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  19. If 0^(@) lt theta lt 90^(@) and cos^(2) theta - sin^(2) theta = 1/2,th...

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  20. If 3 sin theta + 4 cos theta = 5, then 3 cos theta - 4 sin theta is eq...

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