eMathematician Search
Home · Trigonometry · Tables · Signs of trigonometric functions

Signs of trigonometric functions

Table of trigonometric functions (sine, cosine, tangent, cotangent, secant and cosecant) signs in quadrants.

$$\begin{array}{|c|c|c|c|c|} \hline \text{Function} & \text{I} & \text{II} & \text{III} & \text{IV} \\\hline \sin\alpha & + & + & - & - \\\hline \cos\alpha & + & - & - & + \\\hline \tan\alpha & + & - & + & - \\\hline \cot\alpha & + & - & + & - \\\hline \sec\alpha & + & - & - & + \\\hline \csc\alpha & + & + & - & - \\\hline \end{array}$$

Note! To determine sign of the expression we can use calculator with trigonometric functions. This table is helpful when using of calculator is not allowed.

2019-03-03

Comments

This article hasn't been commented yet.

Write a comment

:

:

: