In Δ ABC, right angle at C. Find cos (A+B)
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Answer:
angle A + angle B + angle C = 180°. ( ANGLE SUM PROPERTY )
angle A + angle B = 180° - 90°
angle A + angle B = 90°
cos ( A + B )
cos ( 90° )
= 0
sorry I am not able to put the sign of angle that is why I had written there angle....
Hope it helps u my friend...
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