2 years ago

Which choice represents an irrational number?

Mathematics

1 answer:

shepuryov [24]2 years ago

6 0

The fourth answer (D) is correct because it cannot be expressed as a fraction.

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Tems11 [23]

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Are the ratios 4:9 & 12:18 equivalent?

Zigmanuir [339]

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Given points (r1, u1 ) and (r2, u2) in polar coordinates, obtain a general formula for the distance between them. Simplify it as

sertanlavr [38]

Answer:

$d=\sqrt{r_1^2+r_2^2-2r_1r_2\cos(u_2-u_1)}$

Step-by-step explanation:

The Law of Cosines gives an immediate result. No translation to Cartesian coordinates is necessary. That law makes use of the angle between the vectors, u2-u1

$d^2=r_1^2+r_2^2-2r_1r_2\cos(u_2-u_1)\\\\\boxed{d=\sqrt{r_1^2+r_2^2-2r_1r_2\cos(u_2-u_1)}}$