Mat 161 PreCalculus

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Mat 161 - PreCalculus

• Double Angle and Half Angle Formulas
• (Section 6.3)

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Trigonometric Identities

• Identities
• sin(2A) 2sinAcosB
• 2) cos(2A) cos2A sin2A
• 3) tan(2A)

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Trigonometric Identities

• Use the above identities to find the exact value
  of,
• given that sin A -1/3 and and A is in quadrant
  IV.
• sin(2A)
• cos(2A)
• tan(2A)
• cot(2A)

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Trigonometric Identities

• Verify the identity

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Trigonometric Identities

• Identities
• sin( )
• 2) cos( )
• 3) tan( )

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Trigonometric Identities

• Use the above identities to find the exact value
  of,
• given that cot A -3 and and A is in quadrant
  IV.
• sin(A/2)
• cos(A/2)
• tan(A/2)
• cot(A/2)

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Trigonometric Identities

• Use the above identities to find the exact
• value of
• sin(15)
• cos(75)
• tan(112.5)
• tan(7?/8)

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Trigonometric Identities

• Reference
• Algebra and Functions
• Blitzer
• 3rd Edition

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Trigonometric Identities

• Find the exact value of the following using
• the following triangle.
• sin(2A)
• tan(2A)
• cos(A/2)
• Tan(A/2)

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