Question

Evaluate the expression. Assume that all angles are in Quadrant I.

sec(cos-1 3/5)

a. 3/5
b. 4/5
c. 5/4
d. 5/3

Answer 1

find sec(a)

Answer 2

5/3

Answer 3

but its like a double secant right? so does it switch back to 3/5? @BAdhi

Answer 4

anybody please help!

Answer 5

ya i wanna try it

Answer 6

let \[\cos^{-1} (3/5)= \theta\]

Answer 7

\[or, \cos \theta =\frac{ 3 }{ 5 }\]

Answer 8

now we can draw a right triangle