Answer:
(d).
Step-by-step explanation:
sin² β + cos² β = 1
cos (α + β) = cos α cos β - sin α sin β
cos α = √(1 -
) = 21 / 29
cos β = 12 / 13
sin β = √(1 -
) = 5 / 13
sin α = 20 / 29
cos (α + β) =
×
-
×
=
Hello!
When you have a non-exact root (irrational number)
Answer:
x intercept = -7/2
y intercept = 21/5
Step-by-step explanation:
-6x +5y = 21
To find the x intercept, set y=0 and solve for x
-6x +5(0) =21
-6x =21
Divide each side by -6
-6x/-6 = 21/-6
x = -21/6 = -7/2
To find the y intercept, set x=0 and solve for y
-6(0) +5y = 21
5y =21
Divide each side by 5
5y/5 =21/5
y = 21/5
I’m pretty sure the answer is C
Answer:
b
Step-by-step explanation:
im pretty sure its b but if not then c