Solve for 0 =< x =< 360 16/(cos(x+25)+1) = 10, give answers to 2 d.p.
Rearrange to get cos(x+25) = 0.6
Use inverse cosine to get (x+25) = -53.13... 53.13... 306.86... 413.13...
Isolate x to get x = -78.13... 28.13... 281.86... 388.13...
Apply the limits and round the answers to get x = 28.13 and 281.87
BW
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