# How do you find non-permissible values in trigonometry?

## How do you find non-permissible values in trigonometry?

As mentioned earlier, non-permissible values occur when an expression is undefined, most often when the denominator equals zero. In this case, let’s make the denominator equal to zero and simplify.

### What are the non-permissible values of theta for tan theta?

sin θ : tan θ is not defined when θ = 90°, 270°,…. So, the non-permissible values for tan θ are θ ≠ 90° + 180°n, where n ∈ I. sin θ is undefined when sin θ = 0. sin θ can be expressed as a single restriction, θ ≠ 90°n, where n ∈ I.

#### Which of the six trigonometric functions are undefined when?

Second, there is no value for which the cosine and sine functions are undefined. This is because r is the distant from the origin to the point (x,y) ≠ (0,0) on the terminal ray.

**Why do rational expressions have non permissible values?**

A rational expression is a fraction, where p and q are polynomials, q ≠ 0. A non-permissible value is a value of the variable that causes an expression to be undefined. For a rational expression, this occurs when the denominator is zero.

**What are non-permissible values?**

Non-Permissible Value (NPV) The value of a variable that makes the denominator of a rational expression equal to zero. If the denominator contains a binomial, the non-permissible values can be determined from the factored form of the binomial.

## Why do rational expressions have non-permissible values?

### What is non-permissible values?

#### Why is tan 270 undefined?

Explanation: For tan 270 degrees, the angle 270° lies on the negative y-axis. Thus tan 270° value is not defined. Since the tangent function is a periodic function, we can represent tan 270° as, tan 270 degrees = tan(270° + n × 180°), n ∈ Z.

**What values of tan is undefined?**

Answer and Explanation: The tangent function, tan(x) is undefined when x = (π/2) + πk, where k is any integer.

**How do you find non permissible?**

Non-permissible values occur when the denominators equals zero. The restrictions on the variable are: Multiply the numerators and multiply the denominators, writing each product as a single rational expression.

## What’s a non permissible value?

Non-Permissible Values: values of a variable that make the denominator of a rational expression equal 0. Inadmissible Values: values of a variable that do NOT make sense in the context of a given problem.

### What does non permissible mean?

prohibited, proscribed, taboo. (also tabu), verboten.

#### Why tan 90 is not defined?

Why is Tan 90 undefined? As we have got the result as infinity, and we cannot define infinity, therefore tan 90 is undefined.

**Why is cot 180 undefined?**

…and note that the sine of a 180 degree angle is zero, and the cosine of that angle is -1. So, this evaluates to a division by zero. Therefore, cot180 is undefined.

**What is a non permissible value in math?**

## What is a non-permissible value?

As mentioned earlier, non-permissible values occur when an expression is undefined, most often when the denominator equals zero. In this case, let’s make the denominator equal to zero and simplify.

### What are non-permissible values of trig functions?

These values are also called non-permissible values when they result in an expression that is undefined. Below is a trig values chart that has the exact values of trig functions for sine, cosine, and tangent.

#### When to solve for non-permissible trigonometric expressions?

Start now and get better math marks! When dealing with trigonometric functions and expressions, oftentimes we will encounter and be asked to solve for trig values for which an expression is “non-permissible” – that is, our answer would be undefined. This most often occurs when trig values equal zero, for example sin0.

**What notation do you use for non-permissible values?**

Note – I use the same notation for non-permissible values as the text book. For example, if an x value of value is x = -6″. In the videos above, non-permissible values are written using the “not equal sign.”