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# Trigonometry watch

1. I'm doing some trig, and i was just wondering how on earth you solve for x with the domain of 0≤x≤180 or 0≤x≤2π. I just never got that round my head and thankfully that didnt come up in last year's Nat 5 exam. Thanks!
2. (Original post by ThatGuyHarsha)
I'm doing some trig, and i was just wondering how on earth you solve for x with the domain of 0≤x≤180 or 0≤x≤2π. I just never got that round my head and thankfully that didnt come up in last year's Nat 5 exam. Thanks!
Find one solution, then use a graphical method or CAST diagram or whatever your choice of weapon is (youtube it ) to get the other solutions based on that value
3. (Original post by ThatGuyHarsha)
I'm doing some trig, and i was just wondering how on earth you solve for x with the domain of 0≤x≤180 or 0≤x≤2π. I just never got that round my head and thankfully that didnt come up in last year's Nat 5 exam. Thanks!
If you think about it graphically, it's just where your value of trig(x) = a certain y, as x varies from 0 to 180 or 360 or their equivalents in radians. It's setting out a range, tied to the degrees in a circle as that's what sin and cos are linked to, across which your y will hit a certain value once or more than once since the patterns of sin and cos repeat.

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