Answer:

Step-by-step explanation:

Answer:
A = 37 degrees ; B = 82 degrees
Step-by-step explanation:
the angle A plus 143 must measure 180 degrees
angle A = 180 - 143 = 37 degrees
the sum of the inner angles of a triangle is 180 degrees
A + B + C = 180
37 + B + 61 = 180
B = 180 - 98 = 82 degrees
Answer:
.87 I think
Step-by-step explanation:
I believe you have to evaluate the inverse tangent first then do the sine.
tan^-1 34/19 is about 1.06
sin 1.06 is about .87