What is the value of arccos(3/(sqrt(18))) ?

The value of arccos(3/(sqrt(18))) is pi/4

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arccos(3/(sqrt(18)))

arccos (\frac{3}{18})

\frac{π}{4}

Decimal Notation

45

Solution steps

arccos (\frac{3}{18})

Use the following trivial identity:

arccos (\frac{3}{18}) = \frac{π}{4}

arccos (\frac{3}{18})

x - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 arccos (x) π \frac{5 π}{6} \frac{3 π}{4} \frac{2 π}{3} \frac{π}{2} \frac{π}{3} \frac{π}{4} \frac{π}{6} 0 arccos (x) 18 0^{\circ} 15 0^{\circ} 13 5^{\circ} 12 0^{\circ} 9 0^{\circ} 6 0^{\circ} 4 5^{\circ} 3 0^{\circ} 0^{\circ}

= \frac{π}{4}

= \frac{π}{4}

\frac{cos ( 0.01 ) - 1}{0.01}

cos (\frac{5 π}{18}) cos (\frac{2 π}{9}) - sin (\frac{5 π}{18}) sin (\frac{2 π}{9})

arcsin (sin (- \frac{7 π}{6}))

cos (9 8^{\circ})

sin (17 5^{\circ})

What is the value of arccos(3/(sqrt(18))) ?
The value of arccos(3/(sqrt(18))) is pi/4