# Calc01_6 - 1.6 Trig Functions Photo by Vickie Kelly, 2008...

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1.6 Trig Functions Greg Kelly, Hanford High School, Richland, Washington Photo by Vickie Kelly, 2008 Black Canyon of the Gunnison National Park, Colorado

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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 in your book.
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:     cos cos Secant is also an even function, because it is the reciprocal of cosine. Even functions are symmetric about the y - axis.

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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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## This note was uploaded on 12/14/2009 for the course CALC 071265836 taught by Professor Sorray during the Spring '09 term at Air Force Institute of Technology, Ohio.

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Calc01_6 - 1.6 Trig Functions Photo by Vickie Kelly, 2008...

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