trig

express tan 215° as the tangent ratio of an acute angle

Original post by fionachristie

express tan 215° as the tangent ratio of an acute angle

Tried anything?

remember that the tan function repeats every 180 degrees.

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

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

\tan(x)=\tan(x+180)

. Equivalently,

\tan(x)=\tan(x-180)

which is the one you want to use.

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.

How to revise for GCSE Maths: AQA explains what to do

The Student Room community guidelines

What your body does to cope with stress in exams

Writing a psychology personal statement: expert advice from universities