# Calc01_6 - 1.6 Trig Functions Greg Kelly Hanford High...

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1.6 Trig Functions Greg Kelly, Hanford High School, Richland, Washington

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1.6 Trig Functions The Mean Streak, Cedar Point Amusement Park, Sandusky, OH
Trigonometric functions are used extensively in calculus. When you use trig functions in calculus, you must use radian measure for the angles. The best plan is to set the calculator mode to radians and use when you need to use degrees. 2nd o If you want to brush up on trig functions, they are graphed on page 41.

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Even and Odd Trig Functions: “Even” functions behave like polynomials with even exponents, in that when you change the sign of x , the y value doesn’t change. Cosine is an even function because: ( 29 ( 29 cos cos θ θ - = Secant is also an even function, because it is the reciprocal of cosine. Even functions are symmetric about the y - axis.
Even and Odd Trig Functions: “Odd” functions behave like polynomials with odd exponents, in that when you change the sign of x , the sign of the y value also changes.

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