3 sin ( 2 x ) = 3 cos x
3 · 2 sin x cos x - 3 cos x = 0
6 sin x cos x - 3 cos x = 0 /: 3
2 sin x cos x - cos x = 0
cos x ( 2 sin x - 1 )
cos x = 0,
x 1 = π/2, x 2 = 3π/2;
2 sin x - 1 = 0
2 sin x = 1
sin x = 1/2
x 3 = π/6, x 4 = 5π/6.
Dear Nicky37, 300 seconds is only 5 minutes.
Answer:
f(3) = 3
Step-by-step explanation:
f(x) = (1/7)(7x)
f(3) = (1/7)(7×3)
f(3) = (1/7)(21)
f(3) = 3
Answer:
d
Step-by-step explanation:
Is/of times %/100
x/260 times 75/100 cross multiply. 26000=260 times 100 then divide that by 75. That gives you the answer of 195. Try the next one alone, and ask me if you need help still.