tan 5ᵒ tan 25ᵒ tan 30ᵒ tan 65 ᵒtan 85ᵒ=
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Answer:
tan 5° × tan 25° × tan30° × tan (90° - 25°) × tan (90° - 5°)
= tan 5° × tan 25° × tan 30° × cot 25° × cot 5°
= tan 30°
= 1/√3
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