CalcNotes0103-page2

# CalcNotes0103-page2 - (Chapter 1 Review 1.36 Cofunction Identities If x is measured in radians then sin x = cos cos x = sin 2 2 x x We have

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(Chapter 1: Review) 1.36 Cofunction Identities If x is measured in radians, then: sin x = cos ± 2 ² x ³ ´ µ · ¸ cos x = sin 2 ² x ³ ´ µ · ¸ We have analogous relationships for tan and cot, and for sec and csc; remember that they are sometimes undefined. Think : Cofunctions of complementary angles are equal. Even / Odd (or Negative Angle) Identities Among the six basic trig functions, cos (and its reciprocal, sec) are even: cos ± x () = cos x sec ± x = sec x , when both sides are defined However, the other four (sin and csc, tan and cot) are odd:
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## This note was uploaded on 12/29/2011 for the course MATH 150 taught by Professor Sturst during the Fall '10 term at SUNY Stony Brook.

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