Common mistake sine vs. since

sine vs. since

One common mistake that many people make in their writing is confusing the words "sine" and "since." These two words sound similar but have completely different meanings and uses.


The word "sine" is a mathematical term that represents a trigonometric function used to calculate the ratio of the length of the side opposite an angle in a right triangle to the length of the hypotenuse. For example:

  • The sine of an angle of 30 degrees is equal to 0.5.
  • She used the sine function to solve the trigonometry problem.


The word "since" is used as a conjunction or adverb to indicate a point in time or a duration of time. It is also used to introduce a reason or a cause. For example:

  • I haven't seen her since yesterday.
  • Since it's raining, we should bring an umbrella.
  • He has been working for this company since 2010.

As you can see, "sine" is a mathematical term used in trigonometry, while "since" is a word used to talk about time or reasons. It's important to use these words correctly to avoid confusion and to maintain clarity in your writing.

By using the Linguix grammar checker, you can easily identify and correct mistakes like confusing "sine" and "since" in your writing. The AI-powered tool provides real-time suggestions and explanations to help you improve your grammar and writing skills.

sine vs. since mistake examples

  • Incorrect:
    We have not seen him sine two years ago.

    We have not seen him since two years ago.

  • Incorrect:
    We have not seen him sine Monday.

    We have not seen him since Monday.

Linguix Browser extension
Fix your writing
on millions of websites
Linguix pencil
This website uses cookies to make Linguix work for you. By using this site, you agree to our cookie policy