Question

96.
Given that A = B and A is perpendicular to B. What is the angle
between (A+B) and (A-B) ?
1
(1) 30°
(2) 60°
(3) 909
(4) 180°​

Answer 1

Answer:

180 degree

because a is perpendicular to b. perpendicular means 90 degree

when a+b means 90 +90=180