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Where Sin and Cos are Equal

ACTMAT-UNNJJX

For which values of $ {\theta } $:

$$ {0°\le \theta \le 180°} $$

...does $ {\sin{ \theta }=\cos\theta } $?

A

$ 0 $°

B

$30°$

C

$45°$

D

$60°$

E

$90°$