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Schaum's Outline of Theory and Problems of Beginning Calculus

Schaum's Outline of Theory and Problems of Beginning Calculus

Schaum's Outline of Theory and Problems of Beginning Calculus

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CHAP. 271 GRAPHS AND DERIVATIVES OF SINE AND COSINE FUNCTIONS 203(COS (8 + h), sin (0 +\- (COS e, sin 8)(see Problem 26.15)Fig. 27-1= -sin 8 <strong>and</strong> sinThe graph <strong>of</strong> y = cos x is sketched in Fig. 27-2(a). For arguments between --a<strong>and</strong> 0, we have usedthe identity cos (-x) = cos x (Theorem 26.3). Outside the interval [- -a, 4, the curve repeats itself inaccordance with Theorem 26.2.t'(a)y = cosxIY(b) y=sinxFig. 27-2

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