Question

if angleABC is right angled at C, then the value of cos (A+B) is (a) 0 (b) 1/2 (c) √3/2 (d) 1



please answer me with the solution picture​

Answer 1

Answer:

Step-by-step explanation:

as angle c= 90

so angle a+angle b= 180-90 = 90

so cos(a+b)=cos90=0

ans is option a