Question

HURRY UP!!!Right triangle QRS is pictured below.

Which equation gives the correct length of side RS?
A
sin31°=24.8RS
B
sin31°=RS24.8
C
cos31°=RS24.8
D
cos31°=24.8RS

Answer 1

Explanation:

Answer 2

C. cos(31°) = RS/24.8

Explanation:

The mnemonic SOH CAH TOA reminds you of the relation between the adjacent side and the hypotenuse and the trig function of an angle:

Cos = Adjacent/Hypotenuse

In the given triangle, the side adjacent to the 31° angle is RS. The hypotenuse is marked as 24.8. So, the relationship you seek is ...

cos(31°) = RS/24.8 . . . . . matches choice C