We started with some problems involving bearings. The direction can get mixed up pretty easily, but the problems were fairly straightforward.

Another problem asked for the exact value of cos 255 degrees without a calculator. It seemed like a half-angle formula might be a good approach.

One problem involved area which meant needing to know the area formula for a triangle 1/2 bh.

And using inverse trig functions was useful. Other problems in the review did require the law of cosines and the law of sines.

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