Write in Algebraic Form cos(arcsin(2x))

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Write in Algebraic Form cos(arcsin(2x))

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Thank you:)
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Thank you so much!!! My daughter was in tears struggling with this on her homework and you made it understandable for her and me to follow… You are a wonderful teacher!!

GreyWolf
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You are such an unbelievably good teacher. Probably a reflection of how mathematically skilled you are!

wibbers
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Explanation was overkill for me but the key takeaway for me was understanding the goal was to restate the problem in algebraic form. You made it clear that this means to restate it without the trig functions. Thx!

daviddelaney
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If only my teacher was this efficient at explaining things

nathanbuis
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cos(arcsin(2x)) = sqrt( cos(arcsin(2x))^2 ) = sqrt( 1-sin(arcsin(2x))^2 ) = sqrt( 1-(2x)^2 ) = sqrt( 1 - 4x^2 )

НиколайПостников-ум
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4 min better than 12 hours that i've wasted in college

elmoad