## What is Cos inverse?

Arccos definition The arccosine of x is defined as the inverse cosine function of x when -1≤x≤1.

When the cosine of y is equal to x: cos y = x.

Then the arccosine of x is equal to the inverse cosine function of x, which is equal to y: arccos x = cos-1 x = y..

## Is SEC the inverse of cos?

The secant is the reciprocal of the cosine. The cotangent is the reciprocal of the tangent.

## How do you calculate secant?

The secant of an angle in a right triangle is the value found by dividing length of the hypotenuse by the length of the side adjacent the given angle. The secant ratio is the reciprocal of the cosine ratio.

## What is 1 cos 2x equal to?

Cos2x is a double angle trigonometry that has the espansion of cos2x = cos^2(x) -sin^2(x) but you know that sin^2(x) + cos^2(x) = 1.

## What is the exact value of cos 1?

The Value of the Inverse Cos of -1 As you can see below, the cos-1 (1) is 270° or, in radian measure, 3Π/2 .

## What is SEC equal to?

The secant of x is 1 divided by the cosine of x: sec x = 1 cos x , and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x .