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:
The width of the rectangle is <u>7 feet</u>.
Step-by-step explanation:
Given:
The perimeter of a rectangle is 54 feet, and the length is 13 feet more than the width.
Now, to find the width of the rectangle.
Let the width be 
So, the length is 
Perimeter = 54 feet.
Now, to get the width we put formula:




<em>Subtracting both sides by 26 we get:</em>

<em>Dividing both sides by 4 we get:</em>

Therefore, the width of the rectangle is 7 feet.
Answer:
180
Step-by-step explanation:
Area of troiangle=180
A+B+C=180
22+90+B=90
112+B=180
B=180-112
B=68
perimeter=A+B+C
22+90+68=180
Answer:
I believe it is the second one false
Step-by-step explanation:
Answer:
monke
Step-by-step explanation:
monkey