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I am a little bit confused on sin cos and tan. For example, is the correct way to find cosine of, say, x to do the adjacent/hypotenuse then inverse cosine it? (cosX=28/35 [simplify to 0.8], then cos-1(0.8) to get 53.13010235415585?)
Guest Feb 8, 2012
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Use cos-1 to find an angle and cos to find the side
Guest Feb 8, 2012
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also remember SOH-CAH-TOA...

SOA- Sine= opposite over hypotenuse

CAH- Cosine= adjacent over hypotenuse

TOA- Tangent= opposite over adjacent
Guest Feb 8, 2012

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