π－arctan(3/2)－arctan(2/3)=?
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π－arctan(3/2)－arctan(2/3)=?
arctan(-2)+arctan(-3)=?
arctanπ/2＝?
arctan
用复变函数证明arctan (1/2) + arctan (1/3) =π/4
arctan(1/3)+arctan(1/2)的值为?
级数求和：arctan(1/2)+arctan(1/2^2)+arctan(1/2^3)+...+arctan(1/2^n)+...
求证：arctan 1/2+arctan 1/5+arctan 1/8=π/4
cos[arctan(1/2) - arctan(-2)]=?
X－sinx/arctan^3(x)求极限
5.lim(e^x^2) －1/arctan x-0
cos(2arctan√2+π/3)的值为
求值：sin[1/2arctan(-4/3)]
arctan(x^2 - 3)定义域是?
计算cos(1/2arctan(-3/4))
求值 arctan根号3
arctan√3
arctan根号2是什么,