Question

Use inverse trigonometric functions to find the solutions of the equation that are in the given interval, and approximate the solutions to four decimal places.

cos^2(x)- 2cos(x)- 1 = 0; [0, 2Pi)

Answer 1

Can you solve the quadratic -
x^2 - 2x - 1 = 0

Answer 2

is that all i have to do? why does it say use inverse trig functions?

Answer 3

That part will come later..you should learn to break the question :)

Answer 4

yeah lastday is right fufu ull need inverse at last

Answer 5

ok thanks!