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The coefficient of cos ^(3) theta in the...

The coefficient of `cos ^(3) theta` in the expansion of `cos 7theta` in powers of `cos theta` is-

A

56

B

`-56`

C

112

D

`-112`

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The correct Answer is:
A
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 2
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  2. If cos alpha + cos beta =cos ""(3pi)/(7)and sin alpha + sin beta = sin...

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  3. The coefficient of cos ^(3) theta in the expansion of cos 7theta in po...

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  4. If A =580^(@), then which one of the following is correct ?

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  5. The value of (sin 1950^(@)-cos 1950^(@)) is equal to-

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  6. Two sides of a triangle are given by the roots of the equation x^(2) ...

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  7. The value of [sqrt3 cot 20^(@) -4 cos 20^(@)] is equal to-

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  8. If x= cos ^(2) theta + sin ^(4) theta, then for all real values of the...

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  9. In a triangle ABC, (sin A+ sin B+ sin C) (sin A+sin B-sinC)= 3 sin A s...

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  10. The value of sin ""pi/14 sin ""(3pi)/(14)sin ""(5pi)/14 sin ""(7pi)/(...

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  11. If the radius of the circumcircle of the isosceles triangle ABC is equ...

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  12. If 0 lt theta lt (pi)/(2) and sin ""(theta)/(2)=sqrt((x-1)/(2x)), then...

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  13. If sin A =sinB and cos A=cos B, then the value of A in terms of B is-

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  14. If in a triangle ABC, A=45^(@) , B=75^(@), then the value of (a+sqrt2c...

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  15. If sin (pi cos theta)=cos (pi sin theta), then the vlaue of cos (thet...

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  16. The general solution of the equation 4 sin 4 theta -1 =sqrt5 is-

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  17. If tan A + cot A=4, then the value of (tan ^(4) A+cot^(4) A) is

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  18. The general solution of the equation sin theta + cos theta =1 is-

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  19. For theta gt (pi)/(3), the value of f (theta) =(sec ^(2) theta + cos ^...

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  20. In which of the following interval, the equation cos ^(2) x+ sin x+1=0...

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