Trig Functions – Part 2

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2

1Tangent & Cotangent Identities

Pythagorean Identities

Practice Problems

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Tangent & Cotangent Identities

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Pythagorean Identities

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Signs of Trigonometric Functions

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Signs of Trigonometric FunctionsQuadrant Containin

g Q

Positive Functions Negative Functions

I All None

II Sine, Cosecant Cosine, Secant, Tangent, Cotangent

III Tangent, Cotangent Sine, Cosecant, Cosine, Secant

IV Cosine, Secant Sine, Cosecant, Tangent, Cotangent

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Example

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Another Example

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Proof Example

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Proof Example (Cont.)

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Verifying an Identity ExampleVerify the following identity by

transforming the left-hand side into the right-hand side.

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Verifying an Identity Example (Cont.)

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Practice Problems

Page 426Problems 35-53 odd