Sin² x + sin x = 0
sin x ( sin x + 1 ) = 0
sin x = 0 or sin x + 1 = 0
x 1 = kπ, sin x = -1
k ∈ Z x 2 = 3π/2 + 2 kπ, k ∈ Z
Answer:
69°
Step-by-step explanation:
180 - 21 -90 = 69
hope this helps...
Answer:
Step-by-step explanation:
larger radius R=87/2
smaller radius r=65/2
larger semi circle=1/2×2×π×R=π×R=π×87/2=87 π/2≈136.6 m
smaller semicircle =π×r=π×65/2=65 π/2≈102.1 m
length of track=87+65+136.6+102.1≈390.7 m