Step-by-step explanation:
sin(2x) = 2sin(x)cos(x)
2sin(x)cos(x) - cos(x) = 0
so one solution is cos(x) = 0.
=> x = pi/2 and 3pi/2 (90° and 270°)
for cos(x) <> 0 we have then
2sin(x) - 1 = 0
2sin(x) = 1
sin(x) = 1/2
=> x = pi/6 and 5pi/6 (30° and 150°)
Answer:
70, 105, 140
Step-by-step explanation:
Answer:
I'm doing the same thing on my math apeeeeex right now .I wish someone would answer me .
Since rational numbers are any number that can be made into a ratio, i believe all are correct. Normally, they'd be irrational by themselves, but multiplying them by 1/5 changes things.
Answer:
4
Step-by-step explanation:
