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Prove that: cos 10^0cos30^0cos 50^0cos 7...

Prove that: `cos 10^0cos30^0cos 50^0cos 70^0=3/(16)`

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To prove that \( \cos 10^\circ \cos 30^\circ \cos 50^\circ \cos 70^\circ = \frac{3}{16} \), we will follow these steps: ### Step 1: Rewrite the expression We start with the left-hand side (LHS): \[ LHS = \cos 10^\circ \cos 30^\circ \cos 50^\circ \cos 70^\circ \] ...
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