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Evaluate the following: (3 cos 55°/7 sin 35°)-4(cos 70 cosec 20°)/7 (tan 5° tan 25° tan 45° tan 65° tan 85°)

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Evaluate the following:

(3 cos 55°/7 sin 35°)-4(cos 70 cosec 20°)/7 (tan 5° tan 25° tan 45° tan 65° tan 85°)
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tan 5° tan 25° tan 45° tan 65° tan 85° =
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