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3.4 Derivatives of Trig Functions
London Bridge, Lake Havasu City, Arizona Greg Kelly, Hanford High School, Richland, Washington Photo by Vickie Kelly, 2001
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Consider the function slope We could make a graph of the slope: Now we connect the dots! The resulting curve is a cosine curve.
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We can do the same thing for
slope The resulting curve is a sine curve that has been reflected about the x-axis.
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We can find the derivative of tangent x by using the quotient rule.
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Derivatives of the remaining trig functions can be determined the same way.
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