Question

if triangle ABC is right angled at c , then Value of cos (A + B) is. (a) 0 (b) 1 (c) 1/2 (d) ​root 3 by 2

Answer 1

Answer:

answer is 0

Step-by-step explanation:

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Answer 2

Answer:

answer is 0

Step-by-step explanation:

because c is 90°

so a+b =90°

and cos 90° = 0