Question

If cos 37 degrees is close to 4/5, which is closest to the measure of line OP?
a. 20 cm
b. 64 cm
c. 80 cm
d. 100 cm

Answer 1

 We know that ON = 80 cm and ∠ O = 37°.
cos 37° = 4/5
Adjacent / Hypotenuse = cos∠O
80/OP = cos 37°
80/ OP = 4/5
OP = 80 : 4/5 = 80 · 5/4 = 100
Answer:
d. 100 cm.