Trigonometry: Multiple Angle Formulae

First of all, just for humour :

A mathematician once was asked in his class: “What is maths good for?” He replied: “This question makes me sick. Like when you show somebody the Grand Canyon for the first time, and he asks you ‘What’s it good for?’ What would you do? Why, you would kick the guy off the cliff”.

Tap below on today’s topic:

Multiple angle formulae

Tap for answers:

multiple angle formulae(ans)

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