Question

List all the formulae of trignometry​

Answer 1

Answer:

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Answer 2

Answer:

Some formulas that I still remember are given below:--

$cos(x + y) = cos \: x \: cos \: y \: - \: sin \: x \: sin \: y$

$cos \: (x - y) = cos \: x \: cos \: y + sin \: x \: sin \: y$

$sin (x + y) = \: sin \:x \: cos \: y + cos \: x \: sin \: y$