How do we make sine, cosine and tangent one-to-one functions?

2 years ago


1 Reply




Troy Cormier

1 Answer

Liz R Profile Picture
Liz R Verified Sherpa Tutor ✓

Enthusiastic, Patient, Maths Teacher with 30 Years Experience.

5 reviews

You restrict the domain of these functions so that they become one-to-one. So for f(x)=sin (x) the domain becomes (-90<=x<=90 degrees),

for f(x) =cos (x) the domain becomes (0<=x<=180 degrees) and for f(x)=tan(x) the domain becomes (-90<x<90 degrees). This then means that these functions will now each have an inverse. You can also define these domains in radians.

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.

Think you can help?

More Maths A-Level Questions
Sherpa Badge

Need an A-Level Maths tutor?

Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.

Find an A-Level Maths Tutor