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Popular >

cos((10pi)/9)

Solution

cos (\frac{10 π}{9})

Solution

- 0.93969 \dots

Solution steps

cos (\frac{10 π}{9})

Refine to a decimal form

= - 0.93969 \dots

Popular Examples

1/2 (pi-1/2 sin(2pi))

\frac{1}{2} (π - \frac{1}{2} sin (2 π))

cos(arcsin(1/(sqrt(5)))+arctan(1/3))

cos (arcsin (\frac{1}{5}) + arctan (\frac{1}{3}))

sin(arcsin(5/13)+arccos(-3/5))

sin (arcsin (\frac{5}{13}) + arccos (- \frac{3}{5}))

sin (\frac{π}{2}) - 2

4 sin (\frac{11 π}{6})

Frequently Asked Questions (FAQ)

What is the value of cos((10pi)/9) ?
The value of cos((10pi)/9) is -0.93969…