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Mathematics
Marcus
26 August, 18:36
Verify that (sinx - cosx) ^2=1-2sin (x) cos (x)
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Jordon Rowe
26 August, 20:09
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(sinx - cosx) ^2 = (sinx) ^2 + (cosx) ^2 - 2sinxcosx = 1-2sinxcosx
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Lexi Cole
26 August, 21:29
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See below.
Step-by-step explanation:
Left side = (sinx - cosx) ^2 = sin^2 x + cos^2x - 2sinx cosx
Now sin^2 x + cos^2 x = 1 so we have:
1 - 2 sinx cosx = right side.
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