A very simple question for trigonometry! So lets say I want to use a formula for example csc = 1/sin a. Would that still apply if instead of sin a it is - sin a? If not, can I still use this formula is sin a is negative? Thanks!

Step-by-step explanation:

csc = 1/sin a would be OK if you'd insert the argument 'a:'

csc a = 1/sin a    is an identity (a relationship that is always true).  

If you write csc a = 1 / (-sin a) you are creating a conditional equation which may be true for some values of a but not for all.

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )

283 square feet

step-by-step explanation:

good luck