Question

if y = arccot(tanx) find y’ (π/2)
a. 0
b. ½
c. 1
d. -1

Answer 1

\[y' \]

Answer 2

either you can directly differentiate both sides, or just to be on the clever side, make use of this :
tanx = cot(pi/2 -x)

Answer 3

so the answer is 100% = 1?

Answer 4

what makes you say so ?

Answer 5

tanx = cot(pi/2 - x) are the same value

Answer 6

hmmm ??

Answer 7

i mean, then ?

Answer 8

y i getting -1 harr

Answer 9

because it is -1 .. :D