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If sin((pi)/(4)costheta)=cos((pi)/(4)tan...

If `sin((pi)/(4)costheta)=cos((pi)/(4)tantheta),` then `theta` is equal to

A

`npi+(pi)/(4)`

B

`2npipm(pi)/(4)`

C

`npi-(pi)/(4)`

D

`2npipm(pi)/(6)`

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The correct Answer is:
A
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
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  10. The value of x in (0,(pi)/(2)) satisfying the equation sin x cos x =(1...

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  11. If sintheta= costheta=1, then find the general value of theta.

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  12. sqrt(2)sectheta+tantheta=1

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  13. sqrt(3)costheta+sintheta=2

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  14. sin6theta+sin4theta+sin2theta=0,"then "theta=

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  15. sintheta+sin7theta=sin4theta

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  16. Solve (tan3x-tan2x)/(1+tan3xtan2x ')=1

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  17. (tan3theta-1)/(tan3theta+1)=sqrt(3), then the general value of theta i...

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  18. If sin2theta=cos3thetaa n dtheta is an acute angle, then sintheta equa...

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  19. Find the gereral of the equation sinx-3sin2x+sin3x=cosx-3cos2x+cos3x.

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  20. If cot (alpha + beta) = 0, then sin (alpha + 2 beta) is equal to

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