Which of the following is not an identity for tan(x/2)
a.
`(1 - cos x)/(sin x)`

b.
`(sin x)/(1 + cos x)`

c.
`(cos x)/(1-sin x)`

d.
`+- sqrt((1 - cosx)/(1 + cos x))`

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?

Calculate the annual effective interest rate of a 12 % nominal annual interest rate compound monthly