3 years ago

How do I complete this identity? sin(2θ) sin(4θ) cos(2θ) cos(4θ) = ?

Mathematics

1 answer:

egoroff_w [7]3 years ago

8 0

Answer:

sin(20) sin(40) cos(40) cos(20)
[sin(20)*cos(20)]*[sin(40)*cos(40)]
[sin(2*20)/2]*[sin(2*40)/2]
[sin(40)*sin(80)]/2

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