Step-by-step explanation:
-5 7/10
How?
13 4/5
8 1/10
you need similar denominators.
13 4/5 x 2 = 13 8/10
13 8/10 + ? = 8 1/10
8 1/10 + 5 7/10 = 13 4/5
(5 7/10 turned negative bc its below sea level and your technically adding.)
MAY BE INCORRECT!
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
Answer:
yes I can help you with this but I don't know it
He needs to get a 86 on the final to have an 85 in class. I hope this helps!
