We started by using SOHCAHTOA.

One mistake was not including an argument of the function. Sin, cos, tan do not mean anything without an argument. So sinx, cosx, tanx, etc.

Went over some ways to manipulate algebraic expressions.

Talked about how the inverse trig functions reverse the action of a trig function.

They are somewhat like a key which unlocks a box which holds the argument of a trig function and all that is left is the argument.

Reminded about using the degree symbol • and using units when applicable.

Used the Pythagorean Theorem a few times.

Briefly talked about the reciprocals of trig functions.

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