36% = 36/100 divide both numerator and denominator by 4 gives you 9/25
Answer: cos(Θ) = (√15) / 4
Explanation:
The question states:
1) sin(Θ) = 1/4
2) 0 < Θ < π / 2
3) find cos(Θ)
This is how you solve it.
1) Use the fundamental identity (in this part I use α instead of Θ, just for facility of wirting the symbols, but they mean the same for the case).

2) From which you can find:

3) Replace sin(α) with 1/4
=>

=>

4) Given that the angle is in the first quadrant, you know that cosine is positive and the final answer is:
cos(Θ) =

.
And that is the answer.
1. 21,150
2. 2.5193
3. 27.98
4. 11,100
Answer:
b. 12 000 mm
Step-by-step explanation:
multiply by 1 000
Divide both sides by 2 to isolate variable g.
You're left with 6 / 2 < g which equals 3 < g.