First we must apply the Quotient rule that states,
This means that our derivative becomes,
Now we need to calculate and
From here the new equation looks like,
And that is the final result.
Hope this helps.
r3t40
Is 78.50 is the same as 78.5
2 answers:
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Answer:
∠ C = 118°
Step-by-step explanation:
DE = DF , then Δ DEF is isosceles with base angles congruent , then
∠ DEF = ∠ DFE = =
= 62°
∠ DFE and ∠ DFB are adjacent angles on a straight line and sum to 180° , so
∠ DFB = 180° - 62° = 118°
BCDF is a parallelogram ( opposite sides are parallel )
The opposite angles of a parallelogram are congruent , then
∠ C = ∠ DFB = 118°