3 years ago

How to rotate 90 degree counterclockwise

Mathematics

1 answer:

Stella [2.4K]3 years ago

3 0

Rotate once to the left side

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Witch value of x makes the open sentence true? 10-x=3x-4

hichkok12 [17]

10-x=3x-4

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Find the exact value. cos150°

Aloiza [94]

ANSWER

$\cos(150 \degree) = - \frac{ \sqrt{3} }{2}$

EXPLANATION

We want to find the exact value of cos(150°).

150° makes an angle of 30° with the positive direction of the x-axis and it is also in the second quadrant.

The cosine ratio is negative in the second quadrant.

Using the unit circle,

$\cos(150 \degree) = - \cos(30 \degree) = - \frac{ \sqrt{3} }{2}$

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(X^4-81)/x^3+3x^2+9x+27

Iteru [2.4K]

Answer:

x-3

Step-by-step explanation:

(x^2-9)(x^2-9)/x^2*(x+3)+9(x+3)

(x+3)*(x^2+9)/(x+3)*(x^2+9) cross multiply

(x^2+9)*(x+3)/(x^2+9) cross multiply

x+3 final anser

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