Question

Let x be an angle in quadrant such that sec(x)=-5/4.
Find the exact values of sec(x) and sin(x)

Answer 1

I mean adjacent (not opposite)

Answer 2

a²+4²=5²
a= √(5² - 4² )
a=√9
a=3

Answer 3

So we know that
Hyp = 5
Adj=4 And found that Opp=3

Answer 4

you can do the rest.