Respuesta :

Answer:

20/21.

Step-by-step explanation:

tan X = opposite side / adjacent side

=  20/21.

You can use this memory aid for the 3 main trigonometric ratios:

SOH-CAH-TOA:

SineOppositeHypotenuseCosineAdajacentHypotenuseTangentOppositeAdjacent.