Transcription of Trigonometric Identities and Equations
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Trigonometric Identities and Equations
Although it doesn t look like it, Figure 1 above shows the graphs of two func-tions, namelyAlthough these two functions look quite different from one another, they are in factthe same function. This means that, for all values of x,This last expression is an identity,and Identities are one of the topics we will studyin this x 1 sin4 x1 sin2 xy cos2xandy 1 sin4x1 sin2 x795 Trigonometric Identities and EquationsIC^6ci-11xyCHAPTER to and and Half-Angle TrigonometricEquations41088_11_p_795-836 10/11/01 2:06 PM Page 795In this section, we will turn our attention to Identities .
√3 cos √3 2 csc 1 sin 1 3 5 5 3 csc 5 3 sin 3 5 Examples 1 csc 1 r/y y r sin sin 1 csc Section 11.1 Introduction to Identities 797 x y 0 x r y (x, y) θ 41088_11_p_795-836 10/8/01 8:45 AM Page 797
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