Astrophysicist Neil deGrasse Tyson has shared a crucial reason why kids need to keep up with their math homework - as it turns out we actually do need to use it in adult life ...

Solving logarithmic and exponential equations ... equations Trigonometric expressions The addition formulae and trigonometric identities are used to simplify or evaluate trigonometric expressions.

Watch this video to learn about solving trigonometric equations. Let's remind ourselves of what the sine graph looks like so that we can see how many solutions we should be expecting: Therefore ...