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Popular Functions >

inverse of-2cos(x)

Solution

inverse

- 2 cos (x)

Solution

arccos (- \frac{x}{2})

Solution steps

Solve for

cos (x), y = - 2 cos (x)

cos (x) = - \frac{y}{2}

cos (a) = b \Rightarrow a = arccos (b)

arccos (- \frac{y}{2})

Substitute

y = x

arccos (- \frac{x}{2})

Graph

Popular Examples

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Frequently Asked Questions (FAQ)

What is the inverse of-2cos(x) ?
The inverse of-2cos(x) is arccos(-x/2)