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# trig watch

1. express tan 215° as the tangent ratio of an acute angle
2. (Original post by fionachristie)
express tan 215° as the tangent ratio of an acute angle
Tried anything?
3. remember that the tan function repeats every 180 degrees.
4. it’s a one marker. i haven’t been in for a week and my teacher asked me to do these questions but i don’t understand how
5. (Original post by fionachristie)
it’s a one marker. i haven’t been in for a week and my teacher asked me to do these questions but i don’t understand how
As that bear french pepe dude said, tan repeats every 180 degrees. So . Equivalently, which is the one you want to use.
6. Hint: The values of tan(angle) from 0 - 90 repeats themselves every 180 degrees. This means the value of tan30 is the same as the value for tan210.

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