Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Help with this trigonometry equation?

In attached file.

I got the answer correct, but the mark scheme also says 0, 180, and 360 are also solutions, whereas I only got 60 and 300. What am I doing wrong? Thanks.

Attachment image

1 Answer

Relevance
  • 7 years ago

    you eliminated the missing solutions when you divided both sides by sin(theta)

    sin(theta) = 0 is a solution.

Still have questions? Get your answers by asking now.