Question

Evaluate:(1)sin18/cos72. (2)cos48-sin42​

Answer 1

1. sin 18/cos 72= sin 18/sin(90-72)= sin 18/sin 18= 1

2. cos48 -sin42= sin(90-48)-sin 42= sin 42- sin 42= 0

Answer 2

Answer:

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Step-by-step explanation:

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