en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

cos(x)=(-1/2 (0.5)(9))/((0.8)(0.5)(9.8))

Solution

cos (x) = \frac{- \frac{1}{2} ( 0.5 ) ( 9 )}{( 0.8 ) ( 0.5 ) ( 9.8 )}

Solution

x = 2.18215 \dots + 2 πn, x = - 2.18215 \dots + 2 πn

+1

Solution steps

cos (x) = \frac{- \frac{1}{2} ( 0.5 ) ( 9 )}{( 0.8 ) ( 0.5 ) ( 9.8 )}

Simplify

\frac{- \frac{1}{2} \cdot 0.5 \cdot 9}{0.8 \cdot 0.5 \cdot 9.8} : - \frac{4.5}{7.84}

Apply trig inverse properties

x = arccos (- \frac{4.5}{7.84}) + 2 πn, x = - arccos (- \frac{4.5}{7.84}) + 2 πn

Show solutions in decimal form

x = 2.18215 \dots + 2 πn, x = - 2.18215 \dots + 2 πn

Popular Examples

cos (2 a) = \frac{31}{81}

(tan(a)+1)/(tan(a))=2

\frac{tan ( a ) + 1}{tan ( a )} = 2

1-cos(x)=(2sin^2(x))/2

1 - cos (x) = \frac{2 sin ^{2} ( x )}{2}

2sec(2x)+tan(2x)-3=0

2 sec (2 x) + tan (2 x) - 3 = 0

solvefor x,5=9.4cos(x)solve for

x, 5 = 9.4 cos (x)