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Evaluate: cot 30 degree- cot 75 degree/tan 15 degree -tan 60 degree Evaluate: cot 30 degree- cot 75 degree/tan 15 degree -tan 60 degree
As we knowCot 30 = cot (90-60)But cot(90-60) = tan60SimilarilyCot75 = cot (90-15) = tan15Hence question becomes like below, (tan 60 - tan15)/(tan15 - tan60)= -1Hope it helps
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