What is the value of cos(pi/3)-cos(0) ?

The value of cos(pi/3)-cos(0) is -1/2

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cos(pi/3)-cos(0)

cos (\frac{π}{3}) - cos (0)

- \frac{1}{2}

Solution steps

cos (\frac{π}{3}) - cos (0)

Use the following trivial identity:

cos (\frac{π}{3}) = \frac{1}{2}

Use the following trivial identity:

cos (0) = 1

= \frac{1}{2} - 1

Simplify

\frac{1}{2} - 1 : - \frac{1}{2}

= - \frac{1}{2}

5 sin (5 π)

cos (1.25)

3 sin^{2} (4 5^{\circ}) + 4 cos^{2} (4 5^{\circ})

sin (\frac{π}{5}) cos (\frac{2 π}{15}) + cos (\frac{π}{5}) sin (\frac{2 π}{15})

\frac{0.02}{tan ( 20 7 ^{\circ} )}