Step-by-step explanation:
e = 20sin(πt/4 - π/2)
= 20[(sinπt/4)(cosπ/2) - (cosπt/4)(sinπ/2)]
Used sin(x - y) = sinxcosy - cosxsiny.
= 20[0 - cosπt/4]
Since cosπ/2 = 0 and sinπ/2 = 1.
= -20cosπt/4.
You do 10 x 10 6 times and the same for 3 times and your get the answer
example
10^3 x 10^2
10x10x10 = 1,000
10x10 = 100
1,000 x 100 = 100,000
A trinomial is an equation with 3 terms and the only one with 3 terms is the first option
