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7.1-7.2 Basic Trigonometric Identities

7.1-7.2 Basic Trigonometric Identities In this powerpoint, we will use trig identities to verify and prove equations. See what you get. Etc. Proving an Identity. Prove the following:. a) sec x (1 + cos x ) = 1 + sec x. = sec x + sec x cos x = sec x + 1. 1 + sec x.

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7.1-7.2 Basic Trigonometric Identities

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  1. 7.1-7.2 Basic Trigonometric Identities In this powerpoint, we will use trig identities to verify and prove equations

  2. See what you get

  3. Etc.

  4. Proving an Identity Prove the following: a) sec x(1 + cos x) = 1 + sec x = sec x + sec x cos x = sec x + 1 1 + sec x L.S. = R.S. b) sec x = tan x csc x c) tan x sin x + cos x = sec x L.S. = R.S. L.S. = R.S. 5.4.8

  5. Proving an Identity d) sin4x - cos4x = 1 - 2cos2x 1 - 2cos2x = (sin2x - cos2x)(sin2x + cos2x) = (1 - cos2x - cos2x) = 1 - 2cos2x L.S. = R.S. e) L.S. = R.S. 5.4.9

  6. Proving an Identity f) L.S. = R.S. 5.4.10

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