If your looking for a simplified answer, it would be 
.
Hope this helps.
Hope this helps.
Nick was thinking of a number. Nick halves the number and gets an answer 27.3. Form an equation with X from the information
2 answers:
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Answer:
A and C
Step-by-step explanation:
Given
2cos²x - 2 = 0 ( add 2 to both sides )
2cos²x = 2 ( divide both sides by 2 )
cos²x = 1 ( take the square root of both sides )
cos x = ± = ± 1
cos x = 1 ⇒ x = (1) = 0°
cos x = - 1 ⇒ x = (- 1) = 180°