# Hard SAT Math Question 55 — Video Explanation | 1600.now

Source: https://1600.now/hard/55

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55

Which of the following expressions is equivalent to $(\cos 23^\circ)(\sin 67^\circ) + (\sin 23^\circ)(\cos 67^\circ)$?

A

$2(\cos 23^\circ)(\sin 67^\circ)$

B

$2(\cos 23^\circ) + 2(\cos 67^\circ)$

C

$(\cos 23^\circ)^2 + (\sin 67^\circ)^2$

D

$(\cos 23^\circ)^2 + (\cos 67^\circ)^2$