A + -5 = -12
A - 5 = -12
A = -7.
This is the solution.
Sin 3θ = 0
3θ = sin^-1 0 = nπ
θ = nπ/3
(-5/6)+(-5/6) have the same denominator (number at bottom of fraction), so all you have to do is add the numerator(top number). So -5 +-5 =-10 . Now you have -10/6, which simplifies to -5/3.
Hope this helps :)
Answer is:
a) 32
b) 59
Both are arithmetic sequences
