Question

Evaluate : Cos48°-Sin42°​

Answer 1

0

Step-by-step explanation:

$Solution: \\ </h2><h2>To \: simplify \: this, \: \\ </h2><h2>convert \: the \: cos \: function \: </h2><h2> \\ into \: sin \: function \: </h2><h2> \\ \\ We \: know \: that, \: \\ </h2><h2>48° is \: written \: \\ as \: 90°-42° \: which \: is \: equal \: \\ to \: the \: sin42° \\ = Cos(90°-42°) - sin42° \\ Substitute \: the \: value, \: to \: \\ simplify \: this \: equation \: \\ \\ sin42° - sin42° = 0$

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