Cos (A-B) - cos (A+B)
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
=2sinAsinB
Ans: 4
The final price for the racket is $38.96
Answer:
4
Step-by-step explanation:
The student made error in step 2 because negative multiplied by positive is negative. Also negative multiplied by negative is positive
Answer:
V = 77 m^3
Step-by-step explanation:
We want the volume of the cylinder
V = pi r^2 h
We know the diameter not the radius
r = d/2 = 7/2 = 3.5
V = 3.14 * (3.5)^2 (2)
V = 76.93 m^3
To the nearest cubic meter
V = 77 m^3
