exam
Maths Puzzle
Numerical Ability
trig identities- i need help proving that this identity is true
(sin2x/ 1+cos2x) * (cosx/1+cosx) = tan(x/2)
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exam Other Question
How do you find what w is in this problem :
39-12w=7-16w
A coin was flipped 60 times and came up heads 38 times.
(a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
(b) Calculate a p-value and interpret it.