If sinα=cosß it means that ß=90-α. This also means that α+ß=90 so we can say:
4k-22+6k-13=90
10k-35=90
10k=125
k=12.5°
...
The above identity comes up a lot, and is one worth committing to memory for sure.
sinα=cos(90-α) or vice versa cosα=sin(90-α)
Answer:
( x , y ) = ( -1 , - 5 )
Step-by-step explanation:
This was the answer when i did it.
Answer:
The answer to your question is None of the options, the answer is y ≥ 1
Step-by-step explanation:
Inequality
5 - 3 (y + 2) ≤ 6y - 10
1.- Expand
5 - 3y - 6 ≤ 6y - 10
2.- Simplify like terms
-3y - 1 ≤ 6y - 10
3.- Add -6y in both sides
- 3y - 6y - 1 ≤ 6y - 10 - 6y
4.- Simplify
-9y - 1 ≤ -10
5.- Add 1 in both sides
-9y - 1 + 1 ≤ -10 + 1
6.- Simplify
-9y ≤ -9
7.- Divide both sides by -9 and change ≤ by ≥
-9/-9 y ≥ -9/-9
8.- Simplify
y ≥ 1
Answer: they all are different
Step-by-step explanation:
