Question

13. If angle



If angleABC is right angled at C, then the value of cos (A+B) is
(a)
(b) 1
(c) v3/2
(d) none of these​

Answer 1

Answer:

cos ( A+ B ) = 0

Step-by-step explanation:

we know C is 90°

And

A+B+C=180° ( angle sum property)

A+ B = 90

therefore Cos ( A+ B ) = 0

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