cosec(65+A) -sec(25-A)-tan(55-A)+cot(35+A)
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Answer:
cosec (90 - x) = sec x
tan (90-A) = cot A
cosec (65+A) - sec (25-A) - tan (55-A) + cot (35+A)
= cosec {90 - (25-A)} - sec (25-A) - tan {90 - (35+A)} + cot (35+A)
= sec (25-A) - sec (25-A) - cot (35+A) + cot (35+A)
= 0
Hope this helps. Happy learning!!!
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