You should remember your trig functions in this way.
In a 'U' pattern, going down SIN, COS, TAN,
then to the right going up, COT, SEC, CSC
<the order is sin, cos, tan, cot, sec, csc>
SIN ↓ ↑ CSC
COS ↓ U ↑ SEC
TAN →→ ↑ COT
Then learn that sine = Opp/Hyp and cosine = Adj/Hyp
OR - from the mnemonic SOH and CAH
or pretend you are watching fireworks -- Oh! Ah!
you don't need the rest of the mnemonic (TOA) , it is kind of useless,
and it gets in the way and will only cause you Not To Remember the important things.
If you are trying to memorize things from a mnemonic you are learning
them with a blindfold and do not learn how to understand them.
Then learn that Tangent = Sine/Cosine
Sine over cosine is Much more useful than Opp/Adj , and
if you divide sin/cos you get Opp/Adj anyway, so you can find it easily when needed.
Now you have:
SIN = Opp/Hyp CSC
COS = Adj/Hyp SEC
TAN = sin/cos = Opp/Adj COT
Now learn that the trig functions on the right are the reciprocal of those on the left
Now you have:
SIN = Opp/Hyp CSC = 1/sin = Hyp/Opp
COS = Adj/Hyp SEC = 1/cos = Hyp/Adj
TAN = sin/cos = Opp/Adj COT = 1/tan = cos/sin Adj/Opp
It is MUCH easier to remember the important things about the trig functions this way.
Now can you see that if cot θ = 2/3 that tan θ = 3/2
Remember your trig functions like that and you won't ever have to ask again.
For even more goodies and ways to easily remember trig identities and formulas
Look on the internet for "Trig Without Tears" by Stan Brown