Question

Math Analysis: Solve for 0 14 years ago

Answer 1

let y = sinx
so your equation now looks like the quadratic:
y^2 + y - 1 = 0
Using the quadratic formula,
y = (-(1)[plus/minus]sqrt(1^2-4*(1)*(-1))/(2*1)
= (-1[plus/minus]sqrt(5))/2
or
y = (-1+sqrt(5))/2 or
y = (-1-sqrt(5))/2

Once you have these values, stick it in your calculator: arcsin(y)
make sure you're in radian mode.

Answer 2

u mean this http://www.wolframalpha.com/input/?i=solve+sin^2x%2Bsinx-1%3D0+++where+0%3Cx%3C2Pi