sin2x=2sinxcosx
2sinxcosx/-cosx=√2
2sinxcosx=√2
sinx=√2/2
x=(-1)^n * arcsin(π/4)+πn
cosx=√2/2
x=±arccos(π/4)+2πn
1/-cosx=√2
cosx=-√2/2
x=±(π-arccos(π/4))+2πn
sin2x=2sinxcosx
2sinxcosx/-cosx=√2
2sinxcosx=√2
sinx=√2/2
x=(-1)^n * arcsin(π/4)+πn
cosx=√2/2
x=±arccos(π/4)+2πn
1/-cosx=√2
cosx=-√2/2
x=±(π-arccos(π/4))+2πn