What is (cos(x))^2-(sin(x))^2 ?

The solution to (cos(x))^2-(sin(x))^2 is cos(2x)

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simplify (cos(x))^2-(sin(x))^2

simplify

(cos (x))^{2} - (sin (x))^{2}

cos (2 x)

Solution steps

cos^{2} (x) - sin^{2} (x)

Use the Double Angle identity:

cos^{2} (x) - sin^{2} (x) = cos (2 x)

= cos (2 x)

\frac{5}{3 3}

25 (c + d) (c + d)

\frac{1 - 2 i}{4 + 3 i}

\frac{5}{2 x + 1} + \frac{8}{4 x + 2}

2 csc^{2} (x) - 2 csc (x) cot (x)

What is (cos(x))^2-(sin(x))^2 ?
The solution to (cos(x))^2-(sin(x))^2 is cos(2x)