Question

If cos 37° is close to 4/5 , which is closest to the measure of OP?

A. 20 cm
B. 64 cm
C. 80 cm
D. 100 cm

Answer 1

set up a proportion and solve for OP

Answer 2

Okay.. how do I do that? 37/80 = /OP?

Answer 3

no... cos 37 = 4/5 and cos 37 = adj/hyp, so 4/5 = adj/hyp.

what is the adjacent side length? what is the hypotenuese side length?

use the proportion to set up the equation and solve for what you need

Answer 4

cos 37 is opprox 0.8

what is cos 37 in terms of sides (e.g sin = opp/hyp)