(tan 7°)(tan 23°) (tan60°) (tan 67°) (tan 83 °)+ cot 54°/tan 36° + sin 20° sec 70° - 2
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.. (tan 83 degree)+ cot 54 degree/tan 36 degree + sin 20 ... Given, tan7°tan23°tan60°tan67°tan83°.
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