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# What is the trigsimp function in Sympy

This recipe explains what is the trigsimp function in Sympy

Trigsimp function is used to simplify trigonometric identities.

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Example:

```
# Example 1:
# Importing libraries
```

from sympy import pprint, trigsimp, tan

from sympy.abc import p

# Defining some expression

expression= 1 + (tan(p)**2)

# Printing expression

pprint(expression)

# trigsimp function

pprint(trigsimp(expression))

Output - 2 tan (p) + 1 1 ─────── 2 cos (p)

```
# Example 2:
```

# Importing libraries

from sympy import pprint, trigsimp, sin, cos

from sympy.abc import p

# Defining some expression

expression= (sin(p)**2) + (cos(p)**2)

# Printing expression

pprint(expression)

# trigsimp function

trigsimp(expression)

Output - 2 2 sin (p) + cos (p) 1

In this way, we can use trigsimp function in sympy.

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