Consider the function 𝑓 ( 𝑥 , 𝑦 ) = sin ⁡ ( 5 𝑥 𝑦 ) . What is 𝑓 𝑦 𝑥 ?单项选择题

A

25 𝑦 3 sin ⁡ ( 5 𝑥 𝑦 )

B

− 25 𝑥 𝑦 4 sin ⁡ ( 5 𝑥 𝑦 )

C

25 𝑥 𝑦 3 sin ⁡ ( 5 𝑥 𝑦 ) − 25 𝑦 2 cos ⁡ ( 5 𝑥 𝑦 )

D

25 𝑦 2 sin ⁡ ( 5 𝑥 𝑦 ) − 25 𝑥 𝑦 3 cos ⁡ ( 5 𝑥 𝑦 )

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