Mathematics
Senior High
ใชใ๐tan^2 3/8ฯใๅ่งใฎๅ
ฌๅผใซใใฆ่กจใใใจใใซcos 3/4ฯใซใชใใฎใงใใ๏ผ๐๐3/8ใ2/1ใใใฎใงใใใใ๏ผ
ใฉใชใใใใใใใใๆใใฆใใใ ใใใจใใใใใใงใ๏ผ๐๐
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