if triangle ABC is right angied at C, then the value of cos (A+B) is:
1​

1 thought on “if triangle ABC is right angied at C, then the value of cos (A+B) is:<br />1​”

1. Answer:

   0

   Step-by-step explanation:

   As C = 90°

   A + B + C = 180°

   => A + B + 90° = 180°

   => A + B = 90°

   Cos(A+B) = Cos90° = 0

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