- #1
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Need to find derivative
r = sin(θ^{2})cos(2θ)
answer in book
-2sin(θ^{2})sin(2θ)+2θcos(2θ)cos(θ^{2})
My attempt
tried using the product rule
(sin(θ^{2}))(-sin(2θ)) + cos(2θ)cos(θ^{2})
I got stuck right here
r = sin(θ^{2})cos(2θ)
answer in book
-2sin(θ^{2})sin(2θ)+2θcos(2θ)cos(θ^{2})
My attempt
tried using the product rule
(sin(θ^{2}))(-sin(2θ)) + cos(2θ)cos(θ^{2})
I got stuck right here