(tan15°×tan45°×tan60°×tan75°)=?
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Tan 15 × tan75=tan15×cot15=1
tan45=1 and tan60=root3
so the answer is 1×1×√(3)=√(3)
tan45=1 and tan60=root3
so the answer is 1×1×√(3)=√(3)
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