en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

98*cos(30)

Solution

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

Solution

493

+1

Decimal Notation

84.87048 \dots

Solution steps

98 cos (3 0^{\circ})

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}

= 98 \cdot \frac{3}{2}

Simplify

98 \cdot \frac{3}{2} : 493

98 \cdot \frac{3}{2}

Multiply fractions:

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

= \frac{3 \cdot 98}{2}

Divide the numbers:

\frac{98}{2} = 49

= 493

= 493

Popular Examples

csch (1)

cos (π) + i

4 arcsin (1)

3sin(45)+4cos(45)

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

sinh (0.5)

Frequently Asked Questions (FAQ)

What is the value of 98*cos(30) ?
The value of 98*cos(30) is 49sqrt(3)