Trigonometry - Equations
Edexcel C2 Core Maths
In order to solve trig. equations efficiently it is advisable to know the quadrant rule.
Now any trig. equation that you solve will generally reduce down to you having to solve something like the following examples below. Learn how to do these next.
- How to solve sin θ = + value
- How to solve sin θ = - value
- How to solve cos θ = + value
- How to solve cos θ = - value
- How to solve tan θ = + value
- How to solve tan θ = - value
You will then need to be able to solve equations with multiple angles.
Such as
Try it first then check with the worked solution
Hopefully now you should be able to use the quadrant rule to find angles in a given range.