Find all degree solutions to the equation.
?
?
A. 20° + 90°k, 50° + 90°k
B. 50° + 90°k, 65° + 90°k
C. 20° + 90°k, 70° + 90°k
D. 40° + 90°k, 50° + 90°k
E. 40° + 90°k, 70° + 90°k
Answer: E
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