Answer:
2/5
Step-by-step explanation:
4/5 split into 2 is 2/5 or 4/10
Use double and triple angle identities:
sin(2x) + cos(3x)
2 sin x cos x + 4 cos³x − 3 cos x
Answer: D. 5x = 5
Answer: -101
Step-by-step explanation: f(n) = 19-6*n
f(20) = 19 - 6*20
f(20) = -101