A) ¾
B) ⅘
C) ⅗
D) ^5 / 4
The easiest way to solve this problem is to first draw a right triangle, then fill
in the sides.
We know that , so we know that the opposite side is 3,and the adjacent side is 4. The Pythagorean Theorem tells us that 3^2 + 4^2 = c^2 . 9
- 16 = 25 = c^2 , so our hypotenuse is 5. The problem is asking for
, or C.Once we are comfortable with SOHCAHTOA, we can start really having fun by
pairing it with another sparkly new math toy: the unit circle. Take a look.