Answer and Step-by-step explanation:
Let's solve this like a regular equation:
2sin(2x) - 1 = 0
2sin(2x) = 1
sin(2x) = 1/2
Replace 2x with y:
sin(y) = 1/2
What angles for y will make this true? Think to the unit circle; the possible angles are 30° and 150°.
Then, x = 30/2 = 15°or 150/2 = 75°.
(Note that none of the answer choices matches, so the problem/choices may be copied incorrectly)
Answer:
$1.19
Step-by-step explanation:
1 gallon = 8 pints
3 gallons x 8 pints = 24 pints
$28.56 divided by 24= 1.19
$1.19
Answer: pie × r² = 314
Step-by-step explanation:
3.14 ×10 × 10 where r is diameter/2
Answer:
Angle D is equal to 80.
Step-by-step explanation:
We know that the sides are congruent and that angle ACB is congruent to angle ECD by the vertical angles theorem.
Triangles' angles always add up to 180.
180 - 70 - 30 = 80
angle D is equal to 80.
