Answer:
That would be sina.
Step-by-step explanation:
sin(a+b) = sinacosb + cosasinb
sin(a-b) = sinacosb - cosasinb
Adding we get sin(a+b) + sin(a-b) = 2sinaccosb
so sinacosb = 1/2sin(a+b) + sin(a-b)
Answer: country carpets are cheaper
Step-by-step explanation:
Answer:
108
Step-by-step explanation:
12/4=3
36 x 3 = 108
Answer:
x = ±5
Step-by-step explanation:
4x^2 = 100
Divide each side by 4
4/4x^2 = 100/4
x^2 = 25
Take the square root of each side
sqrt(x^2) = ±sqrt(25)
x = ±5
Looks like the series is supposed to be
The series telescopes; consider the 
th partial sum of the series,
As 
, the second term converges to 0, leaving us with
