1
by LJean

2014-05-14T12:01:19+08:00

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
First always remember that SOH CAH TOA is used for right triangles. It is used to determine unknown angles or measure of sides.

O, H, A refer to the different sides of the triangle:
H - hypotenus, the side opposite the 90º angle, also the longest of the three sides
A - adjacent, this is always the one beside the reference angle (aside from 90º)
O - opposite, the angle opposite the reference angle
Note that O and A are interchangeable depending on where the reference angle is.

S, C, T: (this should've been taught to you before sohcahtoa)
S - sine (examples: sin0 = 0 , sin 90º = 1 , sin 30º = 1/2, sin 45º =  / 2)
C- cosine (examples: cos0 =1 , cos 90º = 0 , cos 30º =  /2, cos 45º =  / 2
T - tangent (examples: tan 0 =0 , tan 90º = ∞ , tan 45º = 1)

Let x be the reference angle,
SOH: sin x = opposite /hypotenuse

CAH: cos x = adjacent /hypotenuse

TOA: tan x = opposite /adjacent