Question

if triangle abc is right angled at c then the value of cos (a + b) is

Answer 1

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

Step-by-step explanation:

Answer 2

Answer:

0

Step-by-step explanation:

a+ b +c = 180°

=> a + b +90° =180° ( abc is right angled at c , c =90°)

=> a + b = 180°- 90°

=> a + b = 90°

Now, cos( a + b ) = cos 90°

= 0