Math Exam 2
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Last updated 12:38 PM on 10/5/26
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18 Terms
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Double angle identity: sin(2x)
=2sincos
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Double angle indentity: cos(2x)
***divide theta by 2
=cos² - sin²
=2cos² -1
= 1-2sin²
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half angle indentity: cos² =
= ½ * (1+cos(2x))
= ½ + ½ cos(2x)
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half angle indentity: sin² =
= ½ * (1-cos(2x))
= ½ - ½ cos(2x)
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irreducible, reducible