can any one solve this
tan(55°-A)-cot(35°+A)
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tan (55-A)-cot(35+A)
=cot(90-(55-A))-cot(35+A)
=cot(90-55+A)-cot(35+A)
=cot(35+A)-cot(35+A)
=0
=cot(90-(55-A))-cot(35+A)
=cot(90-55+A)-cot(35+A)
=cot(35+A)-cot(35+A)
=0
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hope this helped ....
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