which one is correct?
a) only if k < 2pi
b) all real number for k
c) only if -1<= k <=1
d) only if k>0
After
sin(kx) = 4/5
I can't continue.
I can guess it's positiv which are first and second quadrant. and I think it cant be 0 because equation =4/5. if sin(0*x)=0
but after all i couldnt figure ou to solve.
Help please.
a) only if k < 2pi
b) all real number for k
c) only if -1<= k <=1
d) only if k>0
After
sin(kx) = 4/5
I can't continue.
I can guess it's positiv which are first and second quadrant. and I think it cant be 0 because equation =4/5. if sin(0*x)=0
but after all i couldnt figure ou to solve.
Help please.