Cos x = -12/13
sin x = -sqrt(13^2 - 12^2) / 13 = -5/13
tan x = 5/12
tan x/2 = (1 - cos x) / sin x = 1 - (-12/13) / -5/13 = 25/13 * -13/5 = -5
2sin^2 x/2 = 1 - cos x = 1 - (-12/13) = 25/13
sin^2 x/2 = 25/13 / 2 = 25/26
sin x/2 = 5/√26
sin x/2 / cos x/2 = tan x/2
cos x/2 = sin x/2 / tan x/2 = 5/√26 / -5 = -1/√26
sin x/2 = 5/√26
cos x/2 = -1/√26
tan x/2 = -5
The answer would be the first option (x+1)(x+8). You would use the foil method, which will give you the equivalent value of the expression.
Hope this helped
Answer:
9?
Step-by-step explanation:
They ate 15 bread..
so if 1 loaf = 12 pc of bread,
they ate 1 loaf and 3 peace’s of another loaf.
their was still 7loafs left so he made
9 loafs if their was 7 whole lofs left, becasue they cut them into peace’s of bread?
