Question

| If triangle ABC is right angled at
ABC is right angled at C, then the value of sec (A+B) is
a) o
b) 1
d) not defined​

Answer 1

Step-by-step explanation:

A+B+C =180

A+B+90=180

or, A+B = 90

Now, Sec(A+B) = sec(90) = 1/Cos(90) =1/0 = not defined or infinite