SAT Math Practice Question #23151 - SATify | SATify

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SAT Math Practice Question #23151 - SATify | SATify

#23151

sequences and series

trigonometry

medium

120 sec

Let $y_{n} = cos^{2} (n^{\circ})$ . What is the mean of $y_{1}, y_{2}, y_{3}, \dots, y_{90}$ ?

A.

$\frac{1}{2}$

B.

$\frac{89}{180}$

C.

$\frac{91}{180}$

D.

$\frac{22}{45}$

E.

$\frac{89}{90}$