 # Trigonometric Equations - Double Angle Identity Types

Related Topics:
A Level Maths
Math Worksheets

Examples, solutions, videos, activities and worksheets that are suitable for A Level Maths.
How to solve trig. equations that require the use of the double angle identities?

Trig. Equations : Double Angle Identity Types : (Example 4)
In this series of tutorials you are shown several examples on how to solve trig. equations that require the use of the double angle identities.
Example:
Solve sin 2x = sin x, for 0° ≤ x ≤ 360°
Trig. Equations : Double Angle Identity Types : (Example 5)
In this series of tutorials you are shown several examples on how to solve trig. equations that require the use of the double angle identities.
Example:
Solve sin(x/2) + cos x = 2, for 0° ≤ x ≤ 360°

Trig. Equations : Double Angle Identity Types : (Example 6)
Example:
Solve 3 tan x = tan 2x, for 0° ≤ x ≤ 2π

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.  