1.(sin 30°)²+(cos 30°)²=1 2.cot(-660°)=√3/3
3.If cot ∅<0, and cos ∅<0,then ∅ lies in quadrant III
4.sin 45° cos 45° - cos 45° sin 45° = 0
5.Cos-300°=-1/2

ALL I NEED TO KNOW IS IF EACH ONE IS TRUE OR FALSE ASAP PLZZZ

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

divide the numbers

step-by-step explanation: