求值sin(π/3+arctan1/2)最好要有过程····
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求值sin(π/3+arctan1/2)最好要有过程····求值sin(π/3+arctan1/2)最好要有过程····求值sin(π/3+arctan1/2)最好要有过程····首先,设a=arct
求值sin(π/3+arctan1/2)最好要有过程····
求值sin(π/3+arctan1/2)
最好要有过程····
求值sin(π/3+arctan1/2)最好要有过程····
首先,设a=arc tan1/2,则tan a=1/2,所以sin a=1/(根号5),cos a=2/(根号5).原式=sin 60*cos a+cos 60*sin a=(2*根号3+1)/2(根号5)
求值:arctan1/2+arctan1/3
求值sin(π/3+arctan1/2)最好要有过程····
arctan1/3+arctan1/2+arctan1=几,
arctan1/2+arctan1/5+arctan1/3
送分ing,求值:arctan1/2+arctan1/3.
求tan(arctan1/2+arctan1/3)
arctan1/2+arctan1/3 解答题求解 谢谢
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求值:sin(2arcsin1/3+arccos1/5)
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求证arctan1/2+arctan1/5+arctan1/8=pai/4
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