Verify the Identity (sin(x)^2-cos(x)^2)/(sin(x)-cos(x))=sin(x)+cos(x)
Start on the left side.
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Cancel the common factor of .
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity
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Name
| Name | one billion nine hundred eighty-seven million nine hundred seventy-seven thousand nine hundred seventy-eight |
|---|
Interesting facts
- 1987977978 has 128 divisors, whose sum is 5202954240
- The reverse of 1987977978 is 8797797891
- Previous prime number is 43
Basic properties
- Is Prime? no
- Number parity even
- Number length 10
- Sum of Digits 72
- Digital Root 9
Name
| Name | five hundred fifty-six million two hundred sixty-nine thousand eighty-seven |
|---|
Interesting facts
- 556269087 has 16 divisors, whose sum is 856714752
- The reverse of 556269087 is 780962655
- Previous prime number is 11
Basic properties
- Is Prime? no
- Number parity odd
- Number length 9
- Sum of Digits 48
- Digital Root 3
Name
| Name | two billion forty-eight million five hundred thirty thousand seven hundred eighty-two |
|---|
Interesting facts
- 2048530782 has 16 divisors, whose sum is 4097802240
- The reverse of 2048530782 is 2870358402
- Previous prime number is 55579
Basic properties
- Is Prime? no
- Number parity even
- Number length 10
- Sum of Digits 39
- Digital Root 3