Question

Gud mrng guys.....

Have a wonderful day....

If triangle ABC is right angled at C, then the value of cos (A+B) is

Answer 1

Hey !!

Good morning , have a nice day you too ☺

HERE IS UR SOLUTION

A + B + C = 180°

A + B = 180° - C

Cos(A + B) = cos ( 180° - C)

Cos(A + B ) = cos ( 180° -90°)

Cos ( A + B ) = cos90°

Cos(A + B ) = 0 Answere

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Hope it helps you !!!

@Rajukumar111

Answer 2

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A + B + C = 180°

A + B = 180° - C

Cos(A + B) = cos ( 180° - C)

Cos(A + B ) = cos ( 180° -90°)

Cos ( A + B ) = cos90°

Cos(A + B ) = 0

Therfore, O is the answer

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