elisameza
15.01.2020 •
Mathematics
Prove the identity sin4x=2sin2xcos2x
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Ответ:
sin4x=sin2(2x), and lets say that 2x=a
By the double angle theorem, we know that sin2a=2sin(a)cos(a)
So substitute 2x for a, and there you go!
Ответ:
2/5
Step-by-step explanation:
If it landed right side up 12 times out of a total of 30 times, you can write this as a fraction: 12/30.
Simplify the fraction:
12/30 divided by 6/6
2/5
This means that 2/5 is the probability.