Question

if the triangle ABC is right angled at c then the value of cost (A+B) is​

Answer 1

Answer:

Step-by-step explanation:

as C is right angle, so , the summation of other angles are (180-90)=90. A+B=90. so, cos(A+B)=cos90°=0.

Hope it help you !

Answer 2

Answer:

The value of cos (A+B) is equal to 0.