40 +/- 360k
Most arcsin solutions follow with 2pik or 360k.
arcsin functions can only fall within -90 and 90 degrees, so 40 can be your only answer, even if you choose to scale the answer.
Write the general solution to y = arcsin (0.6428).
40°±360°k
140°±360°k
220°±360°k
320°±360°k
1 answer