Trig identities precalculus
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Last updated 8:55 PM on 5/11/25
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5 Terms
1
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Sin(2x)
2sin(x) • cos(x)
2
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cos(2x) main stem
cos²(x) - sin²(x)
3
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cos(2x) 2nd identity
2cos²(x)-1
4
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cos(2x) 3rd identity
1-2sin²(x)
5
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tan(2x)
(2tan(x)) / (1 - tan²(x))
