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Formula
Calculate the value
Answer
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$\cos\left( 210 ^{\circ} \right)$
$- \dfrac { \sqrt{ 3 } } { 2 }$
Simplify the expression
$\color{#FF6800}{ \cos\left( 210 ^ { \circ } \right) }$
$ $ Simplify $ $
$\color{#FF6800}{ - } \color{#FF6800}{ \cos\left( 30 ^ { \circ } \right) }$
$- \color{#FF6800}{ \cos\left( 30 ^ { \circ } \right) }$
$\cos\left(30^{\circ}\right) $ is $ \dfrac{\sqrt{3}}{2}$
$- \color{#FF6800}{ \dfrac { \sqrt{ 3 } } { 2 } }$
Solution search results
search-thumbnail-If the sum of two consecutive 
numbers is $45$ and one number is $X$ 
.This statement in the form of 
equation $1s:$ 
$\left(1$ Point) $\right)$ 
$○5x+1$ $1eft\left(x+1$ $r1gnt\right)=45s$ 
$○sx+1ef\left(x+2$ $r1gnt\right)=145s$ 
$sx+1x=45s$
7th-9th grade
Algebra
search-thumbnail-$s|ef\left(-1n$ $\left($ }\right)^{50}\ $\right)$ \ | | is\ equal\ to\ $S$ 
$s1S$ 
$S-1S$ 
$s2S$ 
$s50s$
7th-9th grade
Other
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