Mathematics, 04.10.2019 23:00 ES123
Find the exact value of sin 2u and cos 2u using double angle formula. cos u= -2/3
Answers: 1
, so we can find out what 
is, but there are two possibilities. By the Pythagorean theorem,
for all 
, we end up with exactly one value for 
:
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Find the exact value of sin 2u and cos 2u using double angle formula. cos u= -2/3...
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