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Mathematics 43 Online
NvidiaIntely (nvidiaintely):

@Kevin

NvidiaIntely (nvidiaintely):

OpenStudy (kevin):

cos a = (b^2 + c^2 - a^2) /(2*b*c) cos 62 = (15^2 + 21^2 - a^2) /(2*15*21) 0.47 = (15^2 + 21^2 - a^2) /(2*15*21) a = 19.23

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