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If A, B, C are the angles of a triangle ...

If A, B, C are the angles of a triangle then `tan ((B+C)/2)=`

A

`sin""(A)/(2)`

B

`cot""(A)/(2)`

C

`cos""(A)/(2)`

D

`sec""(A)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
b
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Knowledge Check

  • A,B,C are three angles of a triangle and "sin" (A+c/2)= n "sin" C/2 "tan" A/2 "tan" B/2 =

    A
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    D
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    A
    `2/(n+1)`
    B
    `1/(n+1)`
    C
    `-2/(n+1)`
    D
    `1/(n+1)`

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