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Evaluate the double angle of tangent using a triangle

Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double a given angle is ...
Opinion
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Pre-calculus - determine the double angle of sine when given a triangle and restrictions

Description: 👉 Learn how to evaluate the double angle of sine. The value of the sine of double a given angle can be obtained given the value of the sine of the angle. The value of the sine of double ...
BBC

Module 4 (M4) - Geometry and measures - Circle theorems

Circle theorems are properties that are true for all circles, regardless of their size. There are six theorems to learn and recognise. Questions can have a combination of theorems. It is important to ...
BBC

Higher – Calculations using the alternate segment theorem, tangents and chords

It is important to remember other angles rules, such as angles on a straight line add up to 180°, and to recognise angles in parallel lines. Make sure you are confident in applying Pythagoras’ theorem ...