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Chapter 5 math
Chapter 5 of Pre cal
Question | Answer |
---|---|
Heron's Area formula | square root of s(s-a)(s-b)(s-c)S=1/2 (a+b+c) |
Area of a triangle(not herons) | 1/2(bcsinA) |
how to know if there are 2 triangles | h<a<b and given angle A and A is acute |
law of cosines | a squared=b sq.+c sq.-2bcsinA |
formula involving tangents | 1+tan(sq.)x=sec(sq.)x |
formula for cotangents | ct(sq.)x+1=csc(sq.)x |
which are odd functions | cosine&secant |