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Earn +20 ptsQ: When do you need to approximate an irrational number with a rational value?
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Continue Learning about Algebra
Are repeating decimals an irrational number?
A repeating decimal is a rational number. Its value is(the repeating set of digits)/(as many 9s as there are digits above).
What have you observed from the exponents?
That they can have any value: integer, rational, irrational or complex.
Are radical expressions irrational?
If the value applied in the radical is not a perfect square, it is irrational. 25; 400; and 625 are perfect squares and are rational when applied in a radical.
What is the exact value of cos 70 degrees?
The exact value is an irrational number, and can't be written on paper with digits.0.34202 is less than 0.000042 percent wrong.Cos(70 deg) is an irrational number and it is impossible to give its exact value.
What is the decimal expansion of an irrational no. is?
It is the decimal approximation to the value of the irrational number.
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