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Prove that: t a n 20^@tan40^@tan60^@tan8...

Prove that: `t a n 20^@tan40^@tan60^@tan80^@=3`

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To prove that \( \tan 20^\circ \tan 40^\circ \tan 60^\circ \tan 80^\circ = 3 \), we will follow a systematic approach using trigonometric identities and properties. ### Step-by-Step Solution: 1. **Start with the left-hand side (LHS):** \[ \text{LHS} = \tan 20^\circ \tan 40^\circ \tan 60^\circ \tan 80^\circ \] ...
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