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  1. Use identities to find the value of each expression. 1) If sin , find cos ( 2) If tan ( ) , find cot (

  2. Answers to Verifying Identities. sin x + csc x. 1) csc x. Decompose into sine and cosine. 1. +. sin x sin x. Simplify. 1.

  3. Create your own worksheets like this one with Infinite Precalculus. Free trial available at KutaSoftware.com

  4. Create your own worksheets like this one with Infinite Precalculus. Free trial available at KutaSoftware.com

  5. Worksheet by Kuta Software LLC-3-Answers to Worksheet Review Trig. Identities (basic) (ID: 1) 1) tan2x - sec2x cosx Use tan2x + 1 = sec2x-1 cosx Use secx = 1 cosx-secx 2) tanx + secxDecompose into sine and cosine sinx cosx + 1 cosx Simplify 1 + sinx cosx 3) secx sin3x Use cscx = 1 sinx csc3xsecxUse secx = 1 cosx csc3x cosx

  6. Kuta Software - Infinite Algebra 2 Name_____ Double- and Half-Angle Identities Date________________ Period____ Use a double-angle identity to find the exact value of each expression.

  7. There isn’t an algorithm for verifying trig identities, so these problems take creativity, intuition, and persis-tence. There are a few guiding principles, however: 1.1 Start problems o by picking the low-hanging fruit If you see an immediate application of a trig ID you know, it’s a good idea to go ahead and apply it. For

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