Inverse cosine is used to find a given angle measure when we know the and the . adjacent side; hypotenuse

opposite side; hypotenuse

opposite side; adjacent side

same side; other side

for the points! : )

answer:

c 60% on edg

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63