Question

sin(x)^2+4sin(x)-1=0

Answer 1

what are you trying to calculate?

Answer 2

4 = cot(x)cos(x)

Answer 3

we have to fiind the sin of x and then the related angles using a calculator

Answer 4

Usually we have to factor or use quadratic formula to find sin(x)

Answer 5

let t=sin(x), it can be
t^2+4t-1=0, can't be factor it
so, use quadratic formula :