B.
sin^2x + cos^2x =1
hence Sin^2x-1 = - cos^2x
Hello!
Yesterday he biked

of a kilometer. Today he biked 7 times as far.

x 7 =

Now simplify to get 4

That is your answer.
Enjoy.
~Isabella
Answer:
10.77
Step-by-step explanation:
by using Pythagoras theorem we can find the distance between the points,
so...
distance between the points, which is the hypotenuse will be xy
difference between the y coordinates will be dy
difference between the x coordinates will be dx
according to pythagoras theorem,
They are not equivalent, try adding in numerical values for x, both do not come out the same.