Question

Solve the following equations.
-sin^2(x)=2cosx-2

Answer 1

The first equation can be solved by using the identity
sin^2 x+cos^2 x =1

Answer 2

After substituting -sin^2 x =cos^x -1
You will get a quadratic equation. Find the roots of the equation and then you will have your answers

Answer 3

Sweet thanks ill try and do it now

Answer 4

did you get x=+-2pi n?

Answer 5

What is the range?

Answer 6

3?

Answer 7

Yea i have no idea what i did right or wrong

Answer 8

Range is between what values the value of theta should lie
Right now there are infinite answers for theta. So you should have a range to know what values you're concerned with

Answer 9

It just says solve the equation

Answer 10

Well then you should write theta = cos^-1 1