Joe can clear a lot in 2.5 hours. His partner can do the same job in 7.5 hours. How long will it take them working together?
1 answer:
Answer:
The time required by both persons to complete the work T = 1.458 hours
Step-by-step explanation:
Given data
Time required by Joe to clear a lot = 2.5 hours
Time required by his partner to clear a lot = 2.5 hours
Time required by both persons to complete the work by working together
T = 1.458 hours
Therefore the time required by both persons to complete the work T = 1.458 hours
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Answer:
1 - cosΘ
Step-by-step explanation:
using the identity
sin²x + cos²x = 1 , then
sin²x = 1 - cos²x
= ← factor 1 - cos²Θ as a difference of squares
= ← cancel 1 + cosΘ on numerator/ denominator
= 1 - cosΘ