i almost forgot to do this.

Like I said last week, chapter ten is nothing but formula after formula. So this blog is going to be some more formulas and then an example, but you probably knew that already. That's what most blogs consist of. Anyway here we go. Let's talk about addition and subtraction formulas...with tangent. I don't care if you don't want to. This is like airport security, you do what I say. Anyway, here are those formulas.

tan(alpha+beta)=tan alpha+tan beta/1-tan alpha tan beta

tan(alpha-beta)=tan alpha-tan beta/1+tan alpha tan beta

EXAMPLE

Find the exact value of the given expression:

tan 2pi/3+tan pi/12/1-tan 2pi/3 tan pi/12

First plug it into the equation (:

tan (2pi/3 + pi/12)

Converting to degrees is a good idea.

tan (270 degrees + 15 degrees)=tan 285 degrees

REFERENCE ANGLE TIME.

tan 285-360=-tan(45 degrees)

LOOK AT YOUR TRIG CHART, BUT YOU REALLY SHOULDN'T LOOK BECAUSE YOU SHOULD KNOW IT AND IF YOU DON'T YOU SHOULD BE ASHAMED OF YOURSELF.

final answer= -1

THAT'S HOW YOU DO THAT AND EVERYONE DESERVES A COOKIE :D

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