Step-by-step explanation:
If cosθ = 4/7, we can represent it with the following triangle
To find the sinθ, we need to calculate the missing side x. Using the Pythagorean theorem, we get that the value of x is

Then, sinθ and cscθ have the same sign, so sinθ will be negative and is equal to

Finally, tanθ is equal to

Answer:
Therefore, the answer is
