SOHCAHTOA

sohcahtoa,

sohcahtoa,

sohcahtoa,

you think its easy,

but its quite tricky.

firstly there is three formulae's involved in trigonometry,

sin,

cos,

tan.

sin = opposite / hypotenuse,

cos = adjacent / hypotenuse,

tan = opposite / adjacent.

hypotenuse means

the longest side opposite the right-angle,

adjacent and opposite mean

that the side relates to the angle under

consideration.

for example,

if you want to find the length of side BC

you would,

use the sin rule, because...

we are given angle A and side AB.

AB is the hypotenuse.

BC is opposite angle A.

therefore you would do

sin = opposite / hypotenuse

sin thirty = BC / seven

multiply both sides by seven

seven x sin thirty = BC

using a calculator we get

BC = three point five cm

sohcahtoa,

oh sohcahtoa,

you think you're east but

you're actually quite tricky.