Answer:
Step-by-step explanation:
To solve this problem you must know the formula of subtraction of angles for the function cosx.
The formula is:
We can write 30° as: 45° - 15°
Then:
Using the formula for subtraction of angles we have:
Notice that we have achieved the expression shown in the statement
Finally:
The answer is 28!
you factor the numerator and denominator and cancel the common factors! <3
Im pretty sure its D.79....Hope this helps
Here's infinity minus 1.
If you don't like that, here's 1,153,300,781,250.
_____
Please note that according to the order of operations, the only denominator value is the first box after "÷".
<span>how to convert a repeating decimal to a fraction:
example: 0.0833333....
The repeating pattern is 3.
Let x = 0.083333...
Multiply x by 100 so the first repeat is to the right of the decimal point:
100x = 8.333...
Multiply x by 1000 so the first repeat is to the left of the decimal point:
1000x = 83.333...
Subtract the last two equations:
1000x - 100x = 83.333.... - 8.333...
900x = 75
x = 75/900, which is 1/12 in lowest terms.</span>
