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Popular >

cos(30)*5

Solution

cos (3 0^{\circ}) \cdot 5

Solution

\frac{5 3}{2}

+1

Decimal Notation

4.33012 \dots

Solution steps

cos (3 0^{\circ}) \cdot 5

Use the following trivial identity:

cos (3 0^{\circ}) = \frac{3}{2}

cos (3 0^{\circ})

cos (x)

periodicity table with

36 0^{\circ} n

cycle:

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{3}{2}

= \frac{3}{2} \cdot 5

Simplify

\frac{3}{2} \cdot 5 : \frac{5 3}{2}

\frac{3}{2} \cdot 5

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{3 \cdot 5}{2}

= \frac{5 3}{2}

Popular Examples

tan (8 1^{\circ})

sec (\frac{16 π}{3})

cos(240)-cos(0)

cos (24 0^{\circ}) - cos (0^{\circ})

- cot (- \frac{π}{4})

- sin (3 π)

Frequently Asked Questions (FAQ)

What is the value of cos(30)*5 ?
The value of cos(30)*5 is (5sqrt(3))/2