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In DeltaABC,tan.(A)/(2)+tan.(B)/(2)=...

In `DeltaABC,tan.(A)/(2)+tan.(B)/(2)`=

A

`(c cot.(C)/(2))/(4s)`

B

`(2c cot.(C)/(2))/(a+b+c)`

C

`(2ctan.(C)/(2))/(s)`

D

`(ctan.(C)/(2))/(a+b+c)`

Text Solution

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The correct Answer is:
B
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
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  10. In triangleABC, a^(2) sin2C + c^(2) sin2A=

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  11. If the area of a triangle ABC is given by Delta=a^(2)-(b-c)^(2), then ...

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  12. Let PQR be a triangle of area Delta with a = 2, b = 7/2 and c =5/2, wh...

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  20. If sin^(-1)a+sin^(-1)b+sin^(-1)c=pi, then the value of asqrt((1-a^2))+...

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