Answer:
See below.
Step-by-step explanation:
First, use the co-function identity:
We can turn the second term into cosine:
Substitute:
Now, use the sum to product formulas. We will use the following:
Substitute:
Use the even-odd identity:
Therefore:
Replace the second term with the original term:
Proof complete.
Answer:
$.59 for tax
Step-by-step explanation:
$9 times .065 = .585. if you round it equals $.59
if you add the tax and the regular price together it equals $9.59
Answer:
5x = -2 + 10 + 5.
Step-by-step explanation:
3x - 5 = - 2 + 10
Add 5 to both sides:
5x - 5 + 5 = -2 + 10 +15
5x = -2 + 10 + 5 (answer).
Answer:a
Step-by-step explanation: move c 6 to the right and then up 6
Answer:
<h2>
12(cos120°+isin120°)</h2>
Step-by-step explanation:
The rectangular form of a complex number is expressed as z = x+iy
where the modulus |r| = and the argument
In polar form, x =
Given the complex number, . To express in trigonometric form, we need to get the modulus and argument of the complex number.
For the argument;
Since tan is negative in the 2nd and 4th quadrant, in the 2nd quadrant,
z = 12(cos120°+isin120°)
This gives the required expression.