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A+C=2B implies ( cos C - cos A )/( sin A...

`A+C=2B implies ( cos C - cos A )/( sin A - sin C )=`

A

`cot B `

B

`cot 2B `

C

`tan 2B `

D

`tan B `

Text Solution

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 D ( TRANSFORMATIONS )
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  13. If cos 2B=(cos (A+C))/(cos(A-C)) , then tan A , tan B , tan C are in

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  14. If a* cos ( theta + alpha ) = b cos ( theta - alpha ) , " then " ( a...

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  15. If ( sin (x+y))/(sin (x-y))=(a+b)/(a-b) " then " ( tan x)/(tan y)=

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  16. If cos (A+B) sin (C+D)= cos(A-B)* sin(C-D), then cot A cot B cot C =

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  20. If m sin theta = n sin ( 2alpha + theta ) , " then " (m+n) tan alpha =

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