DO NOW QUIZ Take 3 mins and review your Unit Circle.

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DO NOW QUIZ Take 3 mins and review your Unit Circle.

FQ: HOW CAN WE SIMPLIFY EXPRESSIONS USING TRIG IDENTITIES? MARCH 24, 2014

A trigonometric identity is: - an equation involving trig functions that is true for all values of the variable for which both sides of the equation are defined. Trigonometric Identities

THE MOST FAMOUS TRIG IDENTITY FROM THIS RULE you get… You have to remember these!!!

THE DOUBLE ANGLE FORMULAE (GIVEN ON REGENTS)

SOME TIPS: Substitute the double angles Substitute sin 2 x + cos 2 x = 1 (or another version of it) Substitute your basic trig identities for sec, cos, cot Factor Cancel

TRIG EXAMPLES

PRACTICE TIME!