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If ABC is a right angled triangle, then ...

If ABC is a right angled triangle, then the value of `(cos ^(2)A +cos ^(2) B+ cos ^(2)C)` is -

A

2

B

1

C

0

D

`3/2`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • If A+B+C=pi then the value of cos ^(2)A + cos ^(2) B+ cos ^(2)C is-

    A
    `1-cos A cos B cosC`
    B
    `2 cos A cos B cos C`
    C
    `1-2 cos A cos B cos C`
    D
    `1+2 cos A cos B cos C`

  • In any triangle ABC, the valur of a (cos ^(2) B+ cos ^(2)C)+ cos A (b cos B+ c cos C) is-

    A
    `a+b+c`
    B
    c
    C
    a
    D
    b

  • If A+C+B=180, then the value of (cos ^(2) A+ cos ^(2) B +cos ^(2) C-2 cos A cos B cos C) is-

    A
    3
    B
    2
    C
    1
    D
    0

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