thegreentnt1693 thegreentnt1693

07-06-2023
Mathematics

contestada

θ→0
lim

θ 2
sin(4θ)sin(5θ)

= θ→0
lim

θ
sin(40)

⋅ 4
4

⋅ θ→0
lim

θ
sin(5θ)

⋅ 5
5

=4⋅5=20

please explain this. what is this shortcut? why is there a 4/4 and 5/5 multiplied?

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