Put these in your calculator
and
What do you get?
i am supposed to find all solutions in [0,2pi). the original equation is
4sin^2x - 3sinx - 2 = 0
i started off using the quadratic formula and got
3 +/- sqrt|-3^2 - 4*4*-2 / 2*4
after simplifying all these through i was left with 3 +/- sqrt41/8
this is where i am confused and really have no idea where to continue, there really isn't a problem to explain this in the book so any help would be great.
do you understand how the inverse trig functions work and how to interpret what the calculator is telling you?
Pauls Online Notes : Calculus I - Review : Trig Equations with Calculators, Part I