Question

Use the triangle below (image) to find the following trig ratios. Explain your answers as a fraction.

sin A:

cos A:

tan B:

Answer 1

Fist, we have AC^2 + CB^2 = AB^2:
20^2 +21 ^2= 841
AB = 29
Second , we must to find sinA :
SinA= 21:29 = 21/29
Cos A = 20:29= 20/29
Tan B:20:21=20/21