Double Angle Review

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cos(2θ)

• cos²θ-sin²θ
• 2sinθcos
• 2cos²+1
• sin²θ-1

Tags

CCSS.HSF.TF.C.9

Using the second identity, find Cos(2π)

• sin²(π) - cos²(π) 
• cos²(π) - sin²(π)
• cos²(2π) - sin²(2π)
• sin(2π)cos(2π)

Tags

CCSS.HSF.TF.C.9

Using the first identity, find Sin(180)

• 2sin(90)cos(90)
• 2sin(180)cos(180)
• sin(90)cos(90)
• sin(180)cos(180)

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Simplify using double angle identities

• A

• B

• C

• D

Tags

CCSS.HSF.TF.C.9

Simplify using double angle identities

• A

• B

• C

• D

Tags

CCSS.HSF.TF.C.9