verify that (sin x +cos x) squared=1+sin(2x)

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(sinx+cosx)^2 is a special product Expand= sin^2x+2sinxcosx+cos^2 Note the sin^2x+cos^2x=1 =1+2sinxcox note that 2sinxcosx is an identity of sin2x a double angle identity 1+sin2x=1+sin2x thats all
by Level 1 User (200 points)

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