SAT Math Practice Question #20413 - SATify | SATify

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SAT Math Practice Question #20413 - SATify | SATify

#20413

trigonometry

geometry

hard

180 sec

A right-angled triangle $A BC$ is shown, with the right angle at $C$ . The measure of angle $B$ is $3 0^{\circ}$ and the length of side $A C$ is $10$ . What is the value of $cos A$ ?

A.

$\frac{1}{2}$

B.

$\frac{3}{2}$

C.

$1$

D.

$3$