The square root of 2..........
14i.....................and soh coa toa.........

Calculators have sin, cos and tan, let's see how to use them:

Example: What is the missing length here?

• We know the Hypotenuse
• We want to know the Opposite

Sine is the ratio of Opposite / Hypotenuse:

sin(45°) = Opposite Hypotenuse

Get a calculator, type in "45", then the "sin" key:

sin(45°) = 0.7071...

Now we know all of this:

0.7071... = Opposite 20

A little bit of algebra now. First swap sides:

Opposite 20 = 0.7071...

Then multiply both sides by 20 (the Hypotenuse length):

Opposite	= 0.7071... × 20
	= 14.14 (to 2 decimals)

Done!