What is the value of 55*cos(60) ?

The value of 55*cos(60) is 55/2

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

55*cos(60)

55 \cdot cos (6 0^{\circ})

\frac{55}{2}

Decimal Notation

27.5

Solution steps

55 cos (6 0^{\circ})

Use the following trivial identity:

cos (6 0^{\circ}) = \frac{1}{2}

cos (6 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{1}{2}

= 55 \cdot \frac{1}{2}

Simplify

55 \cdot \frac{1}{2} : \frac{55}{2}

55 \cdot \frac{1}{2}

Convert element to fraction:

55 = \frac{55}{1}

= \frac{1}{2} \cdot \frac{55}{1}

Multiply fractions:

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

= \frac{55 \cdot 1}{1 \cdot 2}

Cancel the common factor:

1

= \frac{55}{2}

= \frac{55}{2}

arctan (\frac{536}{- 3928})

1567.44 sin (- 17.0 7^{\circ})

arcsin (48)

arcsin (55)

sin (arcsec (- 25))