Question

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$\cos(48) - \sin(42)$
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Answer 1

$\huge\bold\blue{solution}$

cos48° - sin42°

= cos(90°-42°) - 42°

= sin42° - sin42°

= 0

Answer 2

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$\Large\fbox{\color{purple}{QUESTION}}$

$\cos(48) - \sin(42)$

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$\Large\fbox{\color{purple}{ SOLUTION }}$

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Cos48° - Cos42°

= Cos(90°-48°) - Cos 42°

= Cos 42° - Cos 42°

= 0

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