Question

ABC is right angled at B, then the value of cos(A + C) is

(a) 0 (b) 1 (c) ½ (d) n.d.​

Answer 1

Step-by-step explanation:

I hope answer is C 1/2 please mark me brainleast

Answer 2

the angle B is 90

then A+B+C= 180

A+C= 180-90

A+C= 90

cos(A+C)= cos 90

= 0