To find a positive and a negative angle coterminal with a given angle, you can add and subtract if the angle is measured in degrees or if the angle is measured in radians

7 0

4 years ago

Find the number of liters in 12.8 gal of gasoline. Round to the nearest hundredth.

Svetlanka [38]

Answer: 48.45 liters

Step-by-step explanation:

Since, $1 \text{ gallon} = 3.78541 \text{ liters}$

⇒ $12.8 \text{ gallon} = 12.8\times 3.78541$

⇒ $12.8 \text{ gallon} = 48.453248 \text{ liters} \approx 48.45 \text{ liters}$

Thus, there are approx 48.45 liters in 12.8 gallon.

5 0

3 years ago

5[x-(4x-5)]=3-8x Solving for x

stiv31 [10]

5(x-4x+5)=3-8x
5x-20x+25=3-8x
-15x+25=3-8x
-7x+25=3
-7x=-22
x= 22/7

7 0

3 years ago

Can someone explain to my why sin(90)=1

ivann1987 [24]

On the unit circle: the end of the terminal side of a 90 degree angle is (1,0) where 1 is the value of sin(90°) and 0 is the value of cos(90°)

On the graph of sine: 90° = $\frac{ \pi }{2}$ radians. if f(x) = sin(x) in radians, f( $\frac{ \pi }{2}$ ) = 1/2

3 0

4 years ago