Applying the trig formula: sin a = cos (90 - a)
cos (2x + 8) = sin (x + 37) = cos (90 - x - 37) = cos (53 - x)
Property of the cosine function -->
(
2
x
+
8
)
=
±
(
53
−
x
)
a. 2x + 8 = 53 - x
3x = 45
x
=
15
∘
b. 2x + 8 = - 53 + x
x
=
−
61
∘
For general answers, add
k
360
∘
Check by calculator.
x = 15 --> sin (x + 37) = sin 52 = 0.788
cos (2x + 8) = cos (38) = 0.788. Proved
x = - 61 --> sin (x + 37) = sin (- 24) = - sin 24 = - 0.407
cos (2x + 8) = cos (-122 + 8) = cos (- 114) = - 0.407. Proved
A=FN-T because you move the variables to the other side
Answer:
135
Step-by-step explanation:
A=1/2(b•h) so,
18x15=270
270/2 =135
Answer:
4.25GPA
Step-by-step explanation:
3+6+2+6/4
= 17/4
= 4.25 to 2d.p
Answer:
18 Dollars
Step-by-step explanation:
180 X .10 = 18 dollars of discount
180-18= 162 is the total of what she paid for the dress
I hope this helped you
