B.
sin^2x + cos^2x =1
hence Sin^2x-1 = - cos^2x
Step-by-step explanation:
yeah she be correct 2.1
Questions seems simple but is not
36 ==> 64
About 77% increase
4a+3b-(-2a-3b)
=4a+3b+2a+3b
=6a+6b
=6(a+b)
A "system" of equations is a set or collection of equations that you deal with all together at once. Linear equations (ones that graph as straight lines) are simpler than non-linear equations, and the simplest linear system is one with two equations and two variables.
