Respuesta :

✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽

Use the trigonometric rules

cosx = adjacent/hypotenuse

Substitute in the values:

cosx = 6/15

Solve:

cosx = 0.4

You need to do cos^-1 to get the angle:

x = 66.42182152

The answer is 66.4

Hope This Helps You!

Good Luck (:

Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ