What is the value of -(2/pi)(4)cos(10)-cos(8) ?

The value of -(2/pi)(4)cos(10)-cos(8) is -2.36229…

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-(2/pi)(4)cos(10)-cos(8)

- (\frac{2}{π}) (4) cos (1 0^{\circ}) - cos (8)

- 2.36229 \dots

Solution steps

- (\frac{2}{18 0 ^{\circ}}) (4) cos (1 0^{\circ}) - cos (8)

Refine to a decimal form

= - 2.36229 \dots

tan^{2} (3 0^{\circ}) + cos^{2} (6 0^{\circ})

\frac{sin ( 6 0 ^{\circ} ) cos ( 3 0 ^{\circ} )}{tan ( 4 5 ^{\circ} )}

\frac{1}{e ^{0.01} ( sin ( 0.01 ) + cos ( 0.01 ) )}

\frac{37. 2 ^{2} sin ( 2 \cdot 14.1 )}{9.8}

\frac{π}{2} - arctan (2)

What is the value of -(2/pi)(4)cos(10)-cos(8) ?
The value of -(2/pi)(4)cos(10)-cos(8) is -2.36229…