# What does SEC mean in trig?

Secant (sec) – Trigonometry function

The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x . 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 .

Similarly, how do you find the SEC? 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.

Keeping this in consideration, is SEC a sin or cos?

Secant, cosecant and cotangent, almost always written as sec, cosec and cot are trigonometric functions like sin, cos and tan. Note, sec x is not the same as cos1x (sometimes written as arccos x). Remember, you cannot divide by zero and so these definitions are only valid when the denominators are not zero.

Is SEC the opposite of Cos?

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

### What is the inverse of sin?

The inverse of the sin function is the arcsin function. But sine itself, would not be invertible because it’s not injective, so it’s not bijective (invertible). To obtain arcsine function we have to restrict the domain of sine to [−π2,π2] .

### What is SEC on a calculator?

Secant (sec) – Trigonometry function In a right triangle, the secant of an angle is the length of the hypotenuse divided by the length of the adjacent side. In a formula, it is abbreviated to just ‘sec’. In fact, most calculators have no button for them, and software function libraries do not include them.

### Is Cotangent the inverse of tangent?

cot(x) = 1/tan(x) , so cotangent is basically the reciprocal of a tangent, or, in other words, the multiplicative inverse. arctan(x) is the angle whose tangent is x.

### Is CSC the inverse of sin?

arcsin is the inverse of the sin function. Meaning that sin(arcsin(x)) = x. The cosecant is the reciprocal of the sine; the arcsin of x is the angle whose sine is x.

### How do you convert COS to tan?

To rewrite the sine function in terms of tangent, follow these steps: Start with the ratio identity involving sine, cosine, and tangent, and multiply each side by cosine to get the sine alone on the left. Replace cosine with its reciprocal function. Solve the Pythagorean identity tan2θ + 1 = sec2θ for secant.

### Why is Secant called Secant?

Secant is a term in mathematics derived from the Latin secare (“to cut”). secant (trigonometry) (Latin: secans), the multiplicative inverse (or reciprocal) trigonometric function of the cosine. the secant method, a root-finding algorithm in numerical analysis, based on secant lines to graphs of functions.

### What is sec theta?

The reciprocal cosine function is secant: sec(theta)=1/cos(theta). The reciprocal sine function is cosecant, csc(theta)=1/sin(theta). And the 3 new functions are secant theta, cosecant theta and cotangent theta. Secant theta is defined as 1 over x. Cosecant theta is 1 over y and cotangent is x over y.

### What is COTX?

cot is a short way to write ‘cotangent’. This is the reciprocal of the trigonometric function ‘tangent’ or tan(x). Therefore, cot(x) can be simplified to 1/tan(x). Using trigonometric rules, an alternative way to write 1/tan(x) is cos(x)/sin(x).

### What is Sin Cos equal to?

Sine, Cosine and Tangent Sine Function: sin(θ) = Opposite / Hypotenuse Cosine Function: cos(θ) = Adjacent / Hypotenuse Tangent Function: tan(θ) = Opposite / Adjacent

### What is Sin Cos Tan in trigonometry?

The cosine (often abbreviated “cos”) is the ratio of the length of the side adjacent to the angle to the length of the hypotenuse. And the tangent (often abbreviated “tan”) is the ratio of the length of the side opposite the angle to the length of the side adjacent. SOH → sin = “opposite” / “hypotenuse”

### What is cos in terms of sin?

Cos THETA = sqroot (1 – sin^2 THETA ) thus we have cosine just in terms of sine.

### What is Sinx and COSX?

sinx. cosx is the product of 2 ratios namely sine and cosine of x this can also be written as the reciprocal of cosecx. secx. Its range is from -1/2 to 1/2.It can be written as 2sinxcosx/2 hence it is equal to sin2x/2= sqrt(1-cos^2 2x)/2.

### What is opposite hypotenuse?

Hypotenuse, opposite, and adjacent. In a right triangle, the hypotenuse is the longest side, an “opposite” side is the one across from a given angle, and an “adjacent” side is next to a given angle. We use special words to describe the sides of right triangles.