What is the value of 7*cos(5.8*pi) ?

The value of 7*cos(5.8*pi) is (7(sqrt(5)+1))/4

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

7cos(5.8pi)

7 \cdot cos (5.8 \cdot π)

\frac{7 ( 5 + 1 )}{4}

Solution steps

7 cos (5.8 π)

= 7 cos (\frac{29}{5} π)

Simplify:

\frac{29}{5} π = \frac{29 π}{5}

= 7 cos (\frac{29 π}{5})

cos (\frac{29 π}{5}) = cos (\frac{9 π}{5})

= 7 cos (\frac{9 π}{5})

Rewrite using trig identities:

cos (\frac{9 π}{5}) = cos (\frac{π}{5})

= 7 cos (\frac{π}{5})

Rewrite using trig identities:

cos (\frac{π}{5}) = \frac{5 + 1}{4}

= 7 \cdot \frac{5 + 1}{4}

Simplify

7 \cdot \frac{5 + 1}{4} : \frac{7 ( 5 + 1 )}{4}

= \frac{7 ( 5 + 1 )}{4}

15 \cdot tan (3 0^{\circ})

\frac{36 sin ( 6 1 ^{\circ} )}{20}

500 cos (12 0^{\circ})

10 sin (\frac{1}{5})

68.12867 \cdot sin (59. 3^{\circ})

What is the value of 7*cos(5.8*pi) ?
The value of 7*cos(5.8*pi) is (7(sqrt(5)+1))/4