- What is the sin x/2 cos x/2 tan x/2 when tan=2 help?

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P(x ≤ 60) that x is a normal variable with mean of 49, and standard deviation of 7.1? An isotope of the element, argon, has a mass number of 38. How many neutrons does it have? please explain? How do you calculate the total received radiation of a planet in W? How does chemistry influence structural in lipids? Which of the following have different electron configuration ?
A) 19K^(+1)
B) 20Ca^(+2)
C) 18Ar
D) 16S^(2)
E)17Cl^(-1)?