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hey dude
tan(90-A)cotA/cosec²A-cos²A
=cotAcotA/cosec²A-cos²A. tan(90-A) =cotA
=cot²A/cosec²A-cos²A
=cos²A/sin²A / 1/sin²A -cos²A
=cos²A/sin²A*sin²A -cos²A
=cos²A-cos²A
=0
hope it helps you and if it then make it a BRAINLIEST ANSWER
tan(90-A)cotA/cosec²A-cos²A
=cotAcotA/cosec²A-cos²A. tan(90-A) =cotA
=cot²A/cosec²A-cos²A
=cos²A/sin²A / 1/sin²A -cos²A
=cos²A/sin²A*sin²A -cos²A
=cos²A-cos²A
=0
hope it helps you and if it then make it a BRAINLIEST ANSWER
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