In order to find out the answer, we need to analyze the letters of the word MAGNETIC
there are 8 letters, all different
so it is 8!=1*2*3*4*5*6*7*8=4032 permutations <span />
Answer:
A sample, or p hat, is representative when the sample closely remebles the population, which are the students in this case. The third and first answer choice would be correct.
Picking lunch period one is wrong because that would overrepresent the students in the first lunch period. Same applies to the first 30 students.
Pick
Answer:
Check the proof below
Step-by-step explanation:
try to verify from RHS to LHS
(Tan a + tan b) / (tan a - tan b)
= (sin a / cos a + sin b /cos b) / ( sin a/ cos a - sin b/ cos b)
= (sin a cos b + cos a sin b)/ (sin a cos b - cos a sin b)
= sin (a+b) / sin (a-b)
Fyi
sin(A+B) = sinAcosB+cosAsinB
sin(A-B) = sinAcosB-cosAsinB