3 years ago

Which of the following is the exact value of cot 60°?

Mathematics

1 answer:

const2013 [10]3 years ago

7 0

Answer:

$\sqrt{3 } \div 3$

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This last one I need help on too

ExtremeBDS [4]

Answer:

$x=\frac{3}{4}+i\frac{\sqrt{7}}{4},\:x=\frac{3}{4}-i\frac{\sqrt{7}}{4}$

Step-by-step explanation:

simplify $\frac{-3}{x-2}$ by putting the negative sign on the outside. $\frac{2x}{x-1}-\frac{2x-5}{x^2-3x+2}=-\frac{3}{x-2}$

find the LCM of the denominators. It is (x-1)(x-2). Multiply by the LCM:

$\frac{2x}{x-1}\left(x-1\right)\left(x-2\right)-\frac{2x-5}{x^2-3x+2}\left(x-1\right)\left(x-2\right)=-\frac{3}{x-2}\left(x-1\right)\left(x-2\right)$

Simplify:

$2x\left(x-2\right)-\left(2x-5\right)=-3\left(x-1\right)$

solve: $x=\frac{3}{4}+i\frac{\sqrt{7}}{4},\:x=\frac{3}{4}-i\frac{\sqrt{7}}{4}$

3 0

3 years ago

Nancy is 5 years younger than her brother Stan. Last year she was twice as young as he was. How old is each of them now?

otez555 [7]

Nancy: 5 Stan: 10

5 is 5 years
younger then Stan
And 5 is twice as
young as 10

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3 years ago

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Which situation could be described by the expression m – 1.85?

mr_godi [17]

Answer:

Step-by-step explanation:

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3 years ago

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DUE FIVE MINUTES HELPPPPPP!!!!!!!!!!!!!!!!

iris [78.8K]

Answer:

This is late you said it was due 5 min. yet I this was posted 5 hours. No one can help now.

Step-by-step explanation:

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3 years ago

Which situation is best represented by the following equation?3x+x=440

lys-0071 [83]

The Given equation is , 3 x + x = 440,

Let speed of train A is x Km/hour and Speed of train B which is a Bullet train which starts from same station but from different platform is 3 times the speed of train A.

And Sum of their Velocities is i.e Velocity of train A and Velocity of train B is 440 Km/hour.

3 0

3 years ago