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16-07-2021
Mathematics

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1/2 sin x sin (2x) + cos^3 x

simplify using trig identities!!

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limichael2005 limichael2005

16-07-2021

Answer:

Step-by-step explanation:

sin(2x) = 2sin(x)cos(x)

so the equation becomes:

1/2sin(x)(2sin(x)cos(x)) +cos^3x = sin^2(x)cos(x) + cos^3(x)

factor cos(x):

cos(x)[sin^2(x) + cos^2(x)] = cos(x)

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