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Popular >

pi^2*cos(pi)

Solution

π^{2} \cdot cos (π)

Solution

- π^{2}

+1

Decimal Notation

- 9.86960 \dots

Solution steps

π^{2} cos (π)

Use the following trivial identity:

cos (π) = (- 1)

cos (π)

cos (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= (- 1)

= π^{2} (- 1)

Simplify

= - π^{2}

Popular Examples

arcsin (2.3)

50 cos (5 3^{\circ})

cos (2.6)

arctan (- \frac{15}{8})

125 sin (4 5^{\circ})

Frequently Asked Questions (FAQ)

What is the value of pi^2*cos(pi) ?
The value of pi^2*cos(pi) is -pi^2