Answer:
When the diameter is given you just take half of it so simply put what is half of 16pi and it will give your answer. :)
Step-by-step explanation:
100 (10)
121 (11)
144 (12)
169 (13)
196 (14)
After moving all the terms to the right of the equation and solving you would get A = -36/49. Hope this helps!
B is your answer if you need me to explain why just ask me :) have a good day
Answer:

Step-by-step explanation:
<u>Funciones Trigonométricas</u>
La identidad principal en trigonometría es:

Si sabemos que A es un ángulo agudo (que mide menos de 90°), su seno y coseno son positivos.
Dado que Sen A = 4/5, calculamos el coseno:

Sustituyendo:




Tomando raíz cuadrada:

La tangente se define como:

Substituyendo:

