How can you prove that
sin4x= 4 cos x sin x - 8 cos x sin(third power)x
1 answer:
If you have some knowledge of complex numbers: This follows pretty much immediately from Euler's formula and DeMoivre's theorem,
(Euler)
(DeMoivre)
so that is the imaginary part of the expanded left hand side.
If that's unfamiliar to you, you can make use of several identities to expand :
(double angle sine)
(double angle sine and cosine)
(Pythagorean)
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Is there some other part of this ?
192 I think 1 rounds down so it doesn't do much
Answer:
1 will be the repeating in the quotient if he continues the process
Step-by-step explanation:
divide 23 by 11 and see the remainder