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9.2 F UNDAMENTAL T RIGONOMETRIC I DENTITIES AND U SING A C ALCULATOR

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T HE T RIGONOMETRIC F UNCTIONS

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T HE R ECIPROCAL I DENTITIES

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T HE Q UOTIENT I DENTITIES

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U SE THE GIVEN INFORMATION TO FIND THE VALUE OF EACH OF THE FOUR REMAINING TRIGONOMETRIC FUNCTIONS.

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U SING A C ALCULATOR TO E VALUATE T RIGONOMETRIC F UNCTIONS Remember that when we evaluate trigonometric functions: the input is the measure of an acute angle and the output is the ratio of the lengths of the sides

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U SING A C ALCULATOR TO E VALUATE T RIGONOMETRIC F UNCTIONS For most acute angles, we approximate the value of each of the trigonometric functions using a calculator. Look for the keys on your calculator. To evaluate csc, sec, and cot, we must use the reciprocal identity and/or the reciprocal keys on the calculator.

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U SE A CALCULATOR TO FIND THE VALUE TO FOUR DECIMAL PLACES. Scientific Calculator Graphing Calculator

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U SE A CALCULATOR TO FIND THE VALUE TO FOUR DECIMAL PLACES. Scientific Calculator Graphing Calculator

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U SE A CALCULATOR TO FIND THE VALUE OF THE SIX TRIGONOMETRIC FUNCTIONS FOR THE GIVEN ANGLE TO FOUR DECIMAL PLACES.

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F IND THE MEASURE OF THE SIDE OF THE RIGHT TRIANGLE WHOSE LENGTH IS DESIGNATED BY A LOWERCASE LETTER. R OUND ANSWERS TO THE NEAREST WHOLE NUMBER. 64 ° 18 x

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F IND THE MEASURE OF THE SIDE OF THE RIGHT TRIANGLE WHOSE LENGTH IS DESIGNATED BY A LOWERCASE LETTER. R OUND ANSWERS TO THE NEAREST WHOLE NUMBER. 19 ° a 15

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