C3 Trig identities

Trig equation which you need to know for C3 

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Trig identities
sin2 + cos2 = 1
tan = sin /cos
sec = 1/cos
cosec = 1/sin
cot = 1/tan --> cos /sin
sec2 = 1 + tan2
cosec2 = 1 + cot2
sin 2 = 2 sin cos
cos 2 = 2cos2 - 1 or
cos 2 = 1 - 2sin2 or
cos 2 = cos2 - sin2

Comments

daviesg

A well presented list of trig identities for revision purposes.

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