Q. Find the derivative of y with respect to θ: y=(5−5θ)tanh−1(θ)
Apply Product Rule: Apply the product rule for differentiation.The product rule states that the derivative of a product of two functions is the derivative of the first function times the second function plus the first function times the derivative of the second function.Let u=(5−5θ) and v=tanh−1θ.Then, dθdy=dθdu⋅v+u⋅dθdv.
Differentiate u: Differentiate u=(5−5θ) with respect to θ. The derivative of a constant is 0, and the derivative of −5θ with respect to θ is −5. So, dθdu=−5.
Differentiate v: Differentiate v=tanh−1θ with respect to θ. The derivative of tanh−1θ with respect to θ is 1−θ21, due to the inverse hyperbolic tangent derivative formula. So, dθdv=1−θ21.
Substitute Derivatives: Substitute the derivatives back into the product rule formula.dθdy=(−5)⋅tanh−1(θ)+(5−5θ)⋅(1−θ21).
Simplify Expression: Simplify the expression. dθdy=−5⋅tanh−1(θ)+(1−θ25)−(1−θ25θ).
More problems from Sin, cos, and tan of special angles