Question

Trigonometry problem help please i worked out just need confirm

Answer 1

8. We know that tanq is undefined at 90°, 270°, and all angles coterminal with 90° and 270° . That is,
for tanq , q ¹ ±90°, ± 270°,± 450°, . Assuming n takes on all integer values, the domain restriction for
the tangent function can be written in set-builder notation either as {q q ¹ 90°+180°n, n any integer} or
{q q ¹ (2n +1) ×90°, n any integer}. Use set-builder notation to express the domain restriction for cotq .

Answer 2

okay i know that cot theta is (x/y) and y cannot equal 0
so it cannot equal 0,180,360,540..... and this is plus or minus
so i put 180n

but everyone else put 180+180n

Answer 3

I would use 180n instead of 180+180n

when n = 0, 180n = 0
when n =1, 180n = 180
when n = 2, 180n = 360

so you can see that we're kicking out all multiples of 180, which are the values that make cot(x) undefined

Answer 4

right because it has to go for both the positive and negative

Answer 5

numbers

Answer 6

but the question is does the 0 degree count