6.3 sine cosine tangent notes...
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6.3 Sine Cosine Tangent Notes FI.notebook
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January 26, 2016
So far you've learned to use Pythagorean Theorem to find the 3rd side of a right triangle if you know two sides. If you only know one side, and it's a 454590 or 306090 right triangle, we could find the other two sides. But what about all the other right triangles that are not special right triangles?
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36o
54o15
We need a new way to find the missing sides of this triangle since it is not a special right triangle and we only know one side. To do this, we will use TRIGONOMETRY!
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