Ineed assistance in this multipart question. this question is quite difficult for me and would gladly appreciate it if someone would me solve this.

6. Expand the left side:

Recall the Pythagorean identity,

which leaves us with

Recall the angle sum formula for cosine:

which gets us to where we need to be:

and we're done.

7. A. The formulas you need are

This gives

7. B. Solving for gives

which holds for

where is any integer.

7. C. Factorize as

From here, we have

which hold for

where is any integer.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation: