Tangent (π- α) × cos (-π/2 +α) > 0. the answer is that cos α < 0. i forgot to put the negative sign. how do i solve this? does this method also applies to sen(-π/2-α). i get confused when i see questions like these.

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.