For positive acute angles
A
A and
B
,
B, it is known that
cos
β‘
A
=
4
5
cosA=
5
4
β
and
sin
β‘
B
=
15
17
.
sinB=
17
15
β
. Find the value of
cos
β‘
(
A
β
B
)
cos(AβB) in simplest form.
Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )