Question

cosec(65+A)-sec(25-A)-tan(55-A)+cot(35+A)​

Answer 1

Answer:

correct answer is 0

Step-by-step explanation:

cosec (65 + A) = sec (90 – (65 + A)) = sec (25 – A ) tan (55 – A) = cot (90 – (55 – A ) = cot (35 + A ) ⇒ sec (25 – A ) – sec (25 – A ) tan (55 – A ) + tan (55 – A) = 0