The set s = " 1 √2 , cos x, cos 2x, cos 3x, cos 4x ( is an orthonormal set of vectors in c[−π, π] with inner product defined by (2).
(a) use trigonometric identities to write the func- tion sin4 x as a linear combination of elements of s.
(b) use part (a) and theorem 5.5.2 to find the values of the following integrals:
(a) ! π −π sin4 x cos x dx
(b) ! π −π sin4 x cos 2x dx
(c) ! π −π sin4 x cos 3x dx
(d) ! π −π sin4 x cos 4x dx

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

false

step-by-step explanation:

rulers and compasses arent required in order to bisect an angle because when bisecting angles, you're making a "half circle" and considering in order to bisect an angle it wouldn't be straight, you wouldn't need either of the two

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²