If sin Ф=1/3>0 and tan Ф<0; then Ф belongs to the second quadrant and cos Ф will be negative (cos Ф<0).
sin²Ф+cos²Ф=1
(1/3)²+cos²Ф=1
1/9+cos²Ф=1
cos²Ф=1-1/9
cos²Ф=8/9
cos Ф=⁺₋√(8/9)=⁺₋2√2 / 3
We have two possible solutions.
cos Ф=2√2 / 3 This solutions is not possible, because in this case cos Ф has to be negative (cos Ф<0)
cos Ф=(-2√2) / 3 this solutions is right.
answer:B. -2 square root 2 /3 (or (-2√2) /3 )
Answer:
$23729.19 ( approx )
Step-by-step explanation:
Cost price = $ 18950
Loss = $ 4780
Loss% = 4780/18950 * 100 = 25.22%
Selling Price = 18950 (100+25.22)/100
= $23729.19 ( approx )
Answer:
I think it would be 15
Step-by-step explanation:
1.53 rounded to the nearest tenth is 1.5
Answer:
0
Step-by-step explanation:
because
k c r
10 + (-10)
10 - 10=0
