Answer:
cosA = √(21/25)
Step-by-step explanation:
We know
sin²(A) + cos²(A) = 1
Next, we know that sin(A) = 2/5. Plugging that into our equation, we get
(2/5)² + cos²A = 1
4/25 + cos²A = 1
subtract 4/25 from both sides to isolate cos²A
cos²A = 1 - 4/25 = 25/25-4/25 = 21/25
square root both sides to get
cosA = √(21/25)
We do not include -√(21/25) in our possible answer for cosA because this is in quadrant 1, so cosA must be positive.
Answer: I don't think any of those choices are correct.
Step-by-step explanation:
2-6*-5t+6
6*-5t+4
<h3>-30t+4</h3>
Honestly I don't know that is a really hard question
If the marathon is 26.2 miles in total and the runner in 10 miles into the race then he has another 16.2 miles to go.
Answer:
148
Step-by-step explanation:
a straight line is always 180 degrees. therefore if you subtract 32 from 180 you are left with 148 degrees.
hope this helps
