sinπ/12+cosπ/12等于多少,不要具体值
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sinπ/12+cosπ/12等于多少,不要具体值
sinπ/12+cosπ/12等于多少,不要具体值
sinπ/12+cosπ/12等于多少,不要具体值
sinπ/12+cosπ/12
=√2 sin(π/12+π/4)
=√2 sin(π/3)
=√2*(√3/2)
=√6/2
sinπ/12+cosπ/12
=√2(sinπ/12cosπ/4+cosπ/12sinπ/4)
=√2sin(π/12+π/4)
=√2sinπ/3
=√6/2
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