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) =
×
-
×
=
Answer:
x=126
Step-by-step explanation:
Answer:
10 times 2x = 30
Step-by-step explanation:
Tried my best
I think it says thirteen divided by thirteen and it will equal thirteen with a remainder of two hope this helps you out