Question

How do you simplify (sec 120° )(cot 225° ) ?

Answer 1

Simplify: y = sec (120)(cot 225)

Ans: -2

Explanation:

`sec 120 = 1/cos 120`. Find cos `120^@`
Trig Table of Special Arcs --> `cos 120 = -1/2` --> `sec 120 = -2`
`cot 225 = cot (45 + 180) = cot 45 = 1`

`y = sec (120).cot (225) = (-2)(1) = - 2`