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nevsk [136]
3 years ago
10

\cos {}^{2} = 1" align="absmiddle" class="latex-formula">


​
Mathematics
1 answer:
Furkat [3]3 years ago
6 0

Yo sup??

4cos²x=1

cos²x=1/4

cosx=±1/2

x=π/3 or x=2π/3

Hope this helps.

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. Mike is buying a large pizza. The pizza cost $8.00 plus .50 for each additional topping. If mike pays $10 for the pizza and to
STatiana [176]

Answer:

4 toppings

Step-by-step explanation:

10 - 8 = 2

2 / .5 = 4

5 0
3 years ago
Read 2 more answers
Solve |9x | ≦ 81
goldenfox [79]
C is the answer cause 9 is the common factor
8 0
3 years ago
Someome help with this plz?​
USPshnik [31]

Answer:

cosec <W = 68/60

Step-by-step explanation:

Using SOH CAH TOA identity

sin theta = opposite/hypotenuse

sin<W = XV/WV

Get WV using pythagoras theorem

WV² = 32²+60²

WV² = 1024 + 3600

WV² = 4624

WV = 68

sin<W =60/68

Since cosec <W = 1/sin<W

cosec <W = 68/60

5 0
3 years ago
Plz help no guessing
ankoles [38]
Your answer would be C. 6.07 × 10^24.

This is because to add numbers in standard form, we need to get their (×10^x) to be the same, as in, we need to get 7 × 10^22 to be [value] × 10^24.

To convert ×10^22 to ×10^24, we need to divide 7 by 100, as 0.07 × 10^24 = 7 × 10^22.

Now that we have them both with the same power, we can add 6 to 0.7 to get 6.07 × 10^24.

I hope this helps! Let me know if you have any questions because my explanation was a bit strange :)
6 0
3 years ago
In a class of 18 students, 5 are math majors. A group of four students is chosen at random. (Round your answers to four decimal
ss7ja [257]

Answer:

(a) 0.2721

(b) 0.7279

(c) 0.2415

Step-by-step explanation:

(a) If we choose only one student, the probability of being a math major is \frac{5}{18} (because there are 5 math majors in a class of 18 students). So, the probability of not being a math major is \frac{18}{18} - \frac{5}{18} = \frac{13}{18} (we subtract the math majors of the total of students).

But there are 4 students in the group and we need them all to be not math majors. The probability for each one of not being a math major is \frac{13}{18} and we have to multiply them because it happens all at the same time.

P (no math majors in the group) = \frac{13}{18} *\frac{13}{18}*\frac{13}{18}*\frac{13}{18} = (\frac{13}{18}) ^4 = 0.2721

(b) If the group has at least one math major, it has one, two, three or four. That's the complement (exactly the opposite) of having no math majors in the group. That means 1 = P (at least one math major) + P (no math major). We calculated this last probability in (a).

So, P (at least one math major) = 1 - P(no math major) = 1 - 0.2721 = 0.7279  

(c) In the group of 4, we need exactly 2 math majors and 2 not math majors. As we saw in (a), the probability of having a math major in the group is 5/18 and having a not math major is \frac{13}{18}. We need two of both, that's \frac{5}{18}*\frac{5}{18}*\frac{13}{18}*\frac{13}{18}. But we also need to multiply this by the combinations of getting 2 of 4, that is given by the binomial coefficient \binom{4}{2}.

So, P (exactly 2 math majors) = \binom{4}{2}*(\frac{5}{18} )^2*(\frac{13}{18})^2 = \frac{4!}{2!2!}*\frac{25}{324}*\frac{169}{324} = 0.2415

7 0
4 years ago
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