In right triangle abc, angle a and angle b are complementary angles. the value of cos a is 5/13. what is the value of sin b.

cos is . So, if cos(a)= then use Pythagorean Theorem to determine the length of the "opposite" side.

5² + x² = 13²

25 + x² = 169

      x² = 144

       x = 12

Now that you know the length of the opposite side, you can plug it in for sin.

sin is . So, sin(a) =

Now, if you switch so you are looking for sin(b), the cos and sin also switch.

cos(b) = sin(a) =

sin(b) = cos(a) =

sin(b) =

no not all of them.

step-by-step explanation:

some of them have a square base.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet