Best Answer

One solution.

(cos x)2 - 2cos x = 3

Factor:

(cos x - 3)(cos x + 1)= 0

cos x = {-1, 3}

Solve:

For cos x = -1, x = 180 deg

No solution for cos x = 3

Q: How many solutions does cos squared minus two cos equal three?

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5

Anything minus itself is zero.

(x + 3)(x - 1)(x + 1)

(-9) / 3 = -3 . Minus nine divided by three is equal to minus three

Three times negative 2 minus three is equal to -9

Related questions

By factoring I get x-3 divided by x+3

It is: 9-4 = 5

5

Three plus three minus 7 is equal to -1

Anything minus itself is zero.

two hundred minus three times a number is equal to nine

(x + 3)(x - 1)(x + 1)

3 squared is 3 x 3 or 9.

(-9) / 3 = -3 . Minus nine divided by three is equal to minus three

No, three squared is nine. 3(squared sign) =3x3 =9

Three times negative 2 minus three is equal to -9

Three minus three times six plus two is equal to -13.