What is the value of -arctan(-1) ?

The value of -arctan(-1) is pi/4

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-arctan(-1)

- arctan (- 1)

\frac{π}{4}

Decimal Notation

45

Solution steps

- arctan (- 1)

Rewrite using trig identities:

arctan (- 1) = - \frac{π}{4}

arctan (- 1)

Use the following property:

arctan (- x) = - arctan (x)

arctan (- 1) = - arctan (1)

= - arctan (1)

Use the following trivial identity:

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{π}{4}

= - (- \frac{π}{4})

Simplify

= \frac{π}{4}

cot (\frac{21 π}{4})

cot (102 0^{\circ})

sin (2) (71.08)

cos (π^{1})

- cot (1.114) csc (1.114)