Expression is not equivalent to (1 − sin2(x)) tan(-x).

If you are looking for an expression that is no equivalent, then:

(cos^2(x) - 1) cot(-x)

Step-by-step explanation:

The expression (cos^2(x) - 1) cot(-x) is not equivalent to (1 − sin2(x)) tan(-x).

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;