What is the relationship between sin(90∘) and sin(−90∘)?

they both have 90 in the name

Step-by-step explanation:

we need to see the graph to know but

strong positive is if it is going up from left to right in a straight diagonal line (like this /)

strong negative is the same but from right to left (like this \)

weak negative is the same as strong negative but its more straight line still right to left

and weak positive is the same as strong positive but more a straight line still left to right though.

to prove δxyz ≅ δmno using sss, you need to show the following:

  side 1             side 2               side 3

xy ≅ mn         yz ≅ no           xz ≅ mo

to prove δxyz ≅ δmno using sas knowing side xz and angle o, you need to show the following:

side 1             connecting angle           side 2

xz ≅ mo             ∠z ≅ ∠o                   yz ≅ no