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The expression (cos 2b-cos 2a)/(sin 2b-s...

The expression `(cos 2b-cos 2a)/(sin 2b-sin2a)` is equal to:

A

`-tan(a+b)`

B

`-tan(a-b)`

C

`cot (a + b)`

D

`- cot (a +b)`.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
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  2. The number of points of intersection of 2y-1=0 and y = sinx,-2 pi lexl...

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  3. The expression (cos 2b-cos 2a)/(sin 2b-sin2a) is equal to:

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  4. If tan x=b/a, then the value of a cos 2x+b sin 2x is :

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

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

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

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

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

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  12. The period of sin 2 theta is :

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

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

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

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

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

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