- #1
Torshi
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Homework Statement
Use quotient rule
Homework Equations
d/dx (cot(x)
The Attempt at a Solution
d/dx (cot(x))
= cos(x)/sin(x)
= (sin(x))(-sin(x)) - (cos(x))(cos(x)) / (sin(x))^2
= -(sin(x))^2 - (cos(x))^2 / (sin(x))^2
= -1 - (cos(x))^2
Does the last step equal 1 + (cos(x))^2 and how come that turns into negative -(csc(x))^2