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受欢迎的三角函数 >

证明 1/(arctan(x))=arccot(x)

解答

证明

\frac{1}{arctan ( x )} = arccot (x)

解答

假

求解步骤

\frac{1}{arctan ( x )} = arccot (x)

两侧不相等

对于

\frac{1}{arctan ( x )} = arccot (x)

代入

x = 1

\frac{1}{arctan ( 1 )} = \frac{4}{π} (Decimal : Degrees : 1.27323 \dots 72.9 5^{\circ})

\frac{1}{arctan ( 1 )}

使用以下普通恒等式:

arctan (1) = \frac{π}{4}

arctan (1)

x 0 \frac{3}{3} 13 arctan (x) 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} arctan (x) 0^{\circ} 3 0^{\circ} 4 5^{\circ} 6 0^{\circ}

= \frac{π}{4}

= \frac{1}{\frac{π}{4}}

化简

= \frac{4}{π}

arccot (1) = \frac{π}{4} (Decimal : Degrees : 0.78539 \dots 4 5^{\circ})

arccot (1)

使用以下普通恒等式:

arccot (1) = \frac{π}{4}

arccot (1)

x - 3 - 1 - \frac{3}{3} 0 \frac{3}{3} 13 arccot (x) \frac{5 π}{6} \frac{3 π}{4} \frac{2 π}{3} \frac{π}{2} \frac{π}{3} \frac{π}{4} \frac{π}{6} arccot (x) 15 0^{\circ} 13 5^{\circ} 12 0^{\circ} 9 0^{\circ} 6 0^{\circ} 4 5^{\circ} 3 0^{\circ}

= \frac{π}{4}

= \frac{π}{4}

两侧不相等

\Rightarrow 假

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