3.2 goes in the first and second blank, 8.7 is the final answer
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:
D. (-1,-2)
Step-by-step explanation:
Every number in the third quadrant of the coordinate plane has negative x and y-coordinates.
- Quadrant 1 - (x, y)
- Quadrant 2 - (-x, y)
- Quadrant 3 (-x, -y)
- Quadrant 4 (x, -y)
Five thousand and five in standard form would be 5,005.
Answer:
0.27659574
Step-by-step explanation:
