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Alborosie
3 years ago
5

Find cot x if sin x cot x csc x = square root of two

Mathematics
1 answer:
Brums [2.3K]3 years ago
5 0
\text{Given: } sin(x) cot(x) cosec(x) = \sqrt{2}
\text{Find: } cot(x)

\text{Important identity: } \boxed{cosec(x) = \frac{1}{sin(x)}}

sin(x) cot(x) cosec(x) = sin(x) cot(x) \frac{1}{sin(x)} = \sqrt{2}
\therefore cot(x) = \sqrt{2}
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Instructions:select all the correct locations on the tables. andrew wants to purchase a new television with a screen length that
DaniilM [7]

The <em>correct answers</em> are:


5x²+70x+245 ≥ 1050; and

Yes.


Explanation:


Let x be the width of the tablet. Since the width of the TV is 7 inches more than the tablet, the width of the TV would be x+7.


The length of the TV is 5 times the width; this makes the length 5(x+7) = 5x+35.


The area of the TV would be given by

(x+7)(5x+35).


Since Andrew wants the area to be at least 1050, we set the expression greater than or equal to 1050:

(x+7)(5x+35) ≥ 1050


Multiplying this, we have:

x*5x+x*35+7*5x+7*35 ≥ 1050

5x²+35x+35x+245 ≥ 1050


Combining like terms,

5x²+70x+245 ≥ 1050


To see if 8 is a reasonable width for the tablet, we substitute 8 for x:

5(8²)+70(8)+245 ≥ 1050

5(64)+560+245 ≥ 1050

320+560+245 ≥ 1050

1125 ≥ 1050


Since this inequality is true, 8 is a reasonable width.

5 0
3 years ago
Which fractions is an equivalent to 1/2
andreyandreev [35.5K]

Answer:

4/8, 8/16, 2/4 any of those

Step-by-step explanation:

8 0
3 years ago
5x - 2 - 9<br> x + y = -3
erik [133]

Answer:

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3 0
3 years ago
Please help, this will just take a minute of your time ❤︎ (literally)<br>(Discriminant Worksheet)
igomit [66]

Answer:

\large\boxed{x=-\dfrac{7-\sqrt{97}}{4}\ \vee\ x=-\dfrac{7+\sqrt{97}}{4}}

Step-by-step explanation:

ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\\text{if}\ \Delta0,\ \text{then an equation has two solutions:}\ x=\dfrac{-b\pm\sqrt\Delta}{2a}\\\\\text{We have:}\\\\-2x^2-7x+10=4\qquad\text{subtract 4 from both sides}\\\\-2x^2-7x+6=0

a=-2,\ b=-7,\ c=6\\\\\Delta=(-7)^2-4(-2)(6)=49+48=97>0\\\\\sqrt\Delta=\sqrt{97}\\\\x=\dfrac{-(-7)\pm\sqrt{97}}{2(-2)}=\dfrac{7\pm\sqrt{97}}{-4}=-\dfrac{7\pm\sqrt{97}}{4}

6 0
3 years ago
Solve 3x 2 + 11x + 6 = 0
ollegr [7]

Answer:

x=

3

2

​

=0.667

x=3

Step-by-step explanation:

6 0
3 years ago
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