Question

Just need help understanding how to do this. An answer for any of them will help.

Answer 1

a) B=65, c=20, a=18

b) A=55, B=35, c=12.5

c) b=4.95, a=7.2, B=55

Explanation:

The sine of an angle is the ratio of the opposite side to the hypotenuse.

The cosine of an angle is the ratio of the adjacent side to the hypotenuse.

For a:

sin25=8/c

From the table sin25=.40

So .40=8/c and so c=8/.4=20

Similarly, cosine can be used to find a.

For the angles, the acute angles of a right triangle will add up to 90.