Find all values of x such that sin(x)^2 + cos(x) + 1 = 0.
1- cos^2 + cos +1 = 0
cos^2 -cos -2 =0 let cos^2 = x^2 use quadratic formula to find x(or cos x) = 2 or -1 x is cos x and cannot = 2 throw this value out
cos x = -1 at 180 degrees
Can someone else verify this answer??
Yes i will verify that.
x=(180+360n) degrees where n is an integer.
Thanx , Melody !