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In a triangle ABC ,cos A + cos B + cos C...

In a triangle ABC ,cos A + cos B + cos C =`3/2`, then the triangle ,is

A

isosceles

B

right angled

C

equilaterial

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

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

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

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    A
    `a^2`
    B
    `b^2-c^2`
    C
    0
    D
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