Answer:
= -3(x+3)x(2x-1)
Step-by-step explanation:
Equation is 112= 14x
x= 8
mulan worked for 8 hours
First way
arcsin(1/4) means that 1/4 sin of the angle.
sin(α)=1/4
sin²α+cos²α=1
(1/4)²+cos²α=1
cos²α=1-1/16 =15/16
cosα=+/-(√15)/4
<span>Second way
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sin(α)=1/4 =opposite leg/hipotenuse
cos(α)=adjacent leg/hypothenuse
adjacent leg =√(hypotenuse²- Opposite²)=√(16-1)=√15
cosα=+/-√15/4
For one value of sinα, possible 2 values of cosα.
Tan (x) = 0.8. To calculate the angle x, find the tan⁻¹ (0.8) = 38.7°
