Question

Prove:: sin 80° cos 20° - cos 80° sin 20° =√3/2​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$Using \: the \: formula \\ </p><p>sin(a - b) = \sin(a) \cos(b) - \cos(a) \sin(b)$

So,

$\sin(80) \cos(20) - \cos(80) \sin(20) \\ = > \sin(80 - 20) \\ = > \sin(60) \\ = > \frac{ \sqrt{3} }{2} = rhs \: \\ </p><p>Hence \: proved.$