tan Q + coto = 1+secQ cosec Q
1-cotQ 1-tanQ
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WE TAKE 1 AS COMMON =1(-COTQ×-TANQ)
1(-1/TANQ×-TANQ)=1(-1/TANQ-TANQ²)
=1(-1-TANQ)
-1-1×TANQ
-1-TANQ ANS
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