Will someone help me with problem 21?
1 answer:
Sin^(1/2) x cos x - sin^(5/2) cos x = sin^(1/2) x cos x - sin(1/2)x sin^2 x cos x factoring we get: cos x sin^(1/2) x ( 1 - sin^2 x) Now 1 - sin^2 x = cos^2 x so we have cos x sin^(1/2) x * cos^2 x = cos^3 x sqrt sin x
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