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The value of f(alpha)=sqrt(cos e c^2alph...

The value of `f(alpha)=sqrt(cos e c^2alpha-2cotalpha)+sqrt(cos e c^2alpha+2cotalpha)` can be `2cotalpha` (b) `-2cotalpha` (c) 2 (d) `-2`

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. If alpha+beta+gamma=2pi, then (a) tan(alpha/2)+tan(beta/2)+tan(gamma...

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  2. The total number of solution of |cotx|=cotx+1/(sinx),x in [0,3pi] , is...

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  3. The value of f(alpha)=sqrt(cos e c^2alpha-2cotalpha)+sqrt(cos e c^2alp...

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  4. If I is the incenter of a triangle ABC, then the ratio I A : I B : I C...

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  5. If asinx+bcos(x+theta)+bcos(x-theta)=d , then the minimum value of |c...

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  6. The number of solution the equation cos(theta).cos(pitheta)=1 has 0 ...

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  7. Let the incircle with center I of A B C touch sides BC, CA and AB at ...

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  8. If x=secvarphi-tanvarphia n dy=cos e cvarphi+cotvarphi, then x=(y+1)/(...

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  9. Prove that 5costheta+3cos(theta+pi/3)+3 lies between -4a n d10.

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  10. The general solution of cosxcos6x=-1 is (a) x=(2n+1)pi,n in Z (b) x=...

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  11. In an acute angled triangle A B C , a semicircle with radius ra is con...

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  12. If f(x)=sin^6x+cos^6x , then range of f(x) is

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  13. Which of the following number(s) is/are rational? (a)sin15^0 (b) co...

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  14. The number of solutions of sum(r=1)^5cosrx=5 in the interval [0,2pi] i...

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  15. The minimum value of atan^2x+bcot^2x equals the maximum value of asin^...

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  16. Let I be the incetre of ΔABC having inradius r. Al, BI and Ci intersec...

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  17. Which of the following statements are always correct (where Q denotes ...

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  18. The greatest value of sin^4theta+cos^4thetai s 1/2 (b) 1 (c) 2 (d...

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  19. In A B C , the bisector of the angle A meets the side BC at D andthe ...

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  20. Let theta in [0,4pi] satisfy the equation (sintheta+2)(sintheta+3)(sin...

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