When is tangent not defined

What does Tangent look like? Where is Cos undefined? Where is Secant undefined? What makes tangent undefined? Why TAN 90 is infinity? What is the inverse of sin? What is the ASTC rule? Can Secant be negative? Is sin the Y? Where is Cos positive? What are the other trigonometric functions?

Can Cotangent be negative? What is the domain of tangent? What is a reference angle? Who invented tangent? Similar Asks. Can the inverse of a relation that is not a function be a function itself? How are the graphs of the sine function and the cosine function similar? We see that at zero degrees, the right triangle will be compressed vertically, and the horizontal leg will be full length or 1.

So, the cosine of zero degrees is 1. As the angle approaches 90 degrees, the triangle will be compressed horizontally and the cosine approaches zero. We can also see that in the first quadrant these horizontal legs will be decreasing from 1 to 0 at 90 degrees.

As we work on the second and third quadrants, we will have horizontal leg length that are left of the y-axis, and therefore will be considered to be negative. So as we move from 90 to degrees we can "see" the horizontal leg going from length zero to length -1, therefore cosine is degreasing again it was in the first also in the second quadrant. In quadrant three, it moves from -1 back to zero and is therefore increasing.

In quadrant four, we go from 0 to 1 and are therefore still increasing. Now we need a behavior chart for the tangent function. Again, we fall back on our geometry roots and remember the meaning of tangent. You remember that a tangent line was a line which intersected a circle in only 1 point, called the point of tangency. The tangent function has infinite vertical asymptotes. Trigonometric Identities An equation becomes an identity when it is true for all the variables involved in it.

Important Notes. Think Tank. Interactive Questions Here are a few activities for you to practice. FAQs on Tangent Function 1. How do you use the word tangent? Why is Tan called tangent? How do you find tangent? How do you know if a function is periodic? How do you find the tangent of a triangle? What is the tangent rule? What is tangent function in trigonometry? Grade 10 Answers Set 1.

Grade 9 Questions Set 1. Grade 9 Answers Set 1. Grade 10 Questions Set 1. More Important Topics. Learn from the best math teachers and top your exams.