Question

AABC is right angled at C, the value of COSCA+B) =
a)0
b)½
c) root 3/2
d)1​

Answer 1

Answer:

In a triangle A+B+C=180

C=90 THEN A+B=90

COS(A+B)=COS90=0

Answer 2

Answer:

AABC is right angled at C, the value of COSCA+B) = 0