Answer:
217/31=7. He needs to run 7 miles per day.
Answer:
3/4 · 7/5=21/20
Step-by-step explanation:
3/4 ÷ 5/7=21/20
Hope this helps!
<span>The cross section of the shape is a triangle.
So B.triangle should be your answer
Hoped this helped :D</span>
Cos(A-B) = cosAcosB + sinAsinB
<span>
cos(</span>π/2 - θ) = cos(π/2)cosθ + sin(π/2)sinθ
π/2 = 90°
cos(π/2) = cos90° = 0. sin(π/2) = sin90° = 1
cos(π/2 - θ) = cos(π/2)cosθ + sin(π/2)sin<span>θ
</span>
= 0*cosθ + 1*sin<span>θ = </span>sin<span>θ
Therefore </span>cos(π/2 - θ) = sin<span>θ
QED </span>
