Is 1/10, 1/4, and 1/8 more or less than 1/2
1 answer:
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Answer:
11.37 lb-ft
Step-by-step explanation:
We are given that
Force,F=3 pounds
Let Point A (3,7) and point B(8,8)
We have to find the work done by the force.
feet
We know that Work done by the force
Substitute the values
Hence, the work done by the force =11.37 lb-ft
Answer:
cos(a + b) =
Step-by-step explanation:
cos(a + b) = cos(a).cos(b) - sin(a).sin(b) [Identity]
cos(a) =
cos(b) =
Since, terminal side of angle 'a' lies in quadrant 3, sine of angle 'a' will be negative.
sin(a) = [Since, sin(a) =
]
=
=
Similarly, terminal side of angle 'b' lies in quadrant 2, sine of angle 'b' will be negative.
sin(b) =
=
=
By substituting these values in the identity,
cos(a + b) =
=
=
=
Therefore, cos(a + b) =