I REALLY NEED HELP!! what is the answer?
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Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)
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Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°
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In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale
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