sin(π/12)-根号3倍cos(π/12)的值
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sin(π/12)-根号3倍cos(π/12)的值sin(π/12)-根号3倍cos(π/12)的值sin(π/12)-根号3倍cos(π/12)的值sin(π/12) - √3c
sin(π/12)-根号3倍cos(π/12)的值
sin(π/12)-根号3倍cos(π/12)的值
sin(π/12)-根号3倍cos(π/12)的值
sin(π/12) - √3cos(π/12)
sin(π/12)-3^(1/2)*cos(π/12)
=2×[(1/2)sin(π/12)-3^(1/2)cos(π/12)]
=2×[cos(π/3)sin(π/12)-sin(π/3)cos(π/12)]
=2×sin(π/12-π/3)
=-2sin(π/4)
=-2×2^(-1/2)
=-2^(1/2)
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