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Tan 15 + Tan105 + cot75
since pi =180 degrees
Tan 15 + tan (180-75)+ cot75
Tan 15 -tan75 + cot75
Tan (45-30)-tan(45+30) + 1/tan(45+30)
(Tan45-tan30 )/1-tan45 tan30 - (tan 45 + tan30)/1-tan45tan30 + (1-tan45tan30)/ tan45+ tan30
Now put the values
since pi =180 degrees
Tan 15 + tan (180-75)+ cot75
Tan 15 -tan75 + cot75
Tan (45-30)-tan(45+30) + 1/tan(45+30)
(Tan45-tan30 )/1-tan45 tan30 - (tan 45 + tan30)/1-tan45tan30 + (1-tan45tan30)/ tan45+ tan30
Now put the values
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