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The triangle ABC of which the angles A, ...

The triangle ABC of which the angles A, B, C satisfy `cos A =(sin B)/(2 sin C)` is-

A

equilateral

B

right angled

C

isosceles

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • In a triangle ABC if there angles are A,B,C then cos ((A+B)/2)

    A
    cos C/2
    B
    (-sinC)
    C
    sin C/2
    D
    cos C

  • In a triangle ABC,sin A-cos B=cosC,then angle B is

    A
    `pi/2`
    B
    `pi/3`
    C
    `pi/4`
    D
    `pi/6`

  • If A, B, C are three angles of /_\ABC , then (ii) cos (A + B) + sin C =

    A
    `sin (B + C) - cos A`
    B
    `sin (A + B) - cos C`
    C
    `sin (A + C) - cos B`
    D
    none of these

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