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Trigonometry

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Finding Cos of 30 Degrees

TRIG-8RL4SJ

What is the $cos(30 ^o)$?

A

$\cfrac { \sqrt { 2 } }{ 2 }$

B

$\cfrac { -\sqrt { 2 } }{ 2 } $

C

$\cfrac { \sqrt { 3 } }{ 2 }$

D

$\cfrac { -\sqrt { 3 } }{ 2 } $

E

$\cfrac { 1 }{ 2 }$

F

$\cfrac { -1 }{ 2 }$