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### Give the function whose 2nd derivative is equal to function itself ...? ____________________________________

```    sinh x, cosh x  both
```
##### Explanation
```First take sinh x
d
First derivative of sinh x = --- sinh x = cosh x
dx
d
Second derivative sinh x   = --- cosh x = sin h x
dx
```

Therefore second derivative of sinh x is sinh x (itself).

```Now take cosh x
d
First derivative of cosh x  = --- cosh x = sinh x
dx
d
Second derivative cosh x    = --- sinh x = cosh x
dx
```

Therefore second derivative of cosh x is cosh x (itself).

____________________________________

##### SHORTCUT TRICKS (Division)
• Divisible by 2 Shortcut trick
• Divisible by 3 Shortcut trick
• Divisible by 4 Shortcut trick
• Divisible by 5 Shortcut trick
• Divisible by 6 Shortcut trick • Divisible by 7 Shortcut trick • Divisible by 8 Shortcut trick • Divisible by 9 Shortcut trick
• Divisible by 10 Shortcut trick

##### Worksheets (Solved)

###### Integration     