Trigonometric Identities 1.0.0
Trigonometric Identities 1.0.0

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Good summary of many trig identities, not all of which are on your formula booklet.  Ignore the bit about the hyperbolic functions (unless if you want to do an IA on them).  

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I am not sure if it's my encoding, but many equal signs and theta's are showing up as other characters. 

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