Sin 18/cos 72+√3 ×(tan 10×tan 30× tan 40×tan 50×tan 80
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sin (90-72)/cos 72 + tan60 × tan 10 x tan30 x tan40 x tan50 x tan80
=cos72/cos72 + tan(90-80)×tan (90-30) x tan (90-50) x tan30 x tan50 x tan80
=1 + cos80 x tan80 x cos30 x tan30 x cos50 x tan50
=1+1×1×1
=1+1
=2
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