Rewrite <math><mstyle displaystyle="true"><mi>tan</mi><mrow><mo>(</mo><mn>270</mn><mo>)</mo></mrow></mstyle></math> in terms of sines and cosines.

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant.

The exact value of <math><mstyle displaystyle="true"><mi>cos</mi><mrow><mo>(</mo><mn>90</mn><mo>)</mo></mrow></mstyle></math> is <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mo>-</mo><mn>1</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> .

The expression contains a division by <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> The expression is undefined.

Undefined

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Name | five hundred seventy-one million three hundred ninety-nine thousand eight hundred thirteen |
---|

- 571399813 has 8 divisors, whose sum is
**579557888** - The reverse of 571399813 is
**318993175** - Previous prime number is
**223**

- Is Prime? no
- Number parity odd
- Number length 9
- Sum of Digits 46
- Digital Root 1

Name | seven hundred eighteen million seven hundred fifty-one thousand six hundred forty-three |
---|

- 718751643 has 16 divisors, whose sum is
**966434976** - The reverse of 718751643 is
**346157817** - Previous prime number is
**233**

- Is Prime? no
- Number parity odd
- Number length 9
- Sum of Digits 42
- Digital Root 6

Name | two billion three million four hundred ninety-three thousand two hundred forty-one |
---|

- 2003493241 has 4 divisors, whose sum is
**2003728500** - The reverse of 2003493241 is
**1423943002** - Previous prime number is
**8849**

- Is Prime? no
- Number parity odd
- Number length 10
- Sum of Digits 28
- Digital Root 1