Identidades Trigonométricas

$$sen \: x = \frac{1}{csc \: x}$$

$$cos \: x = \frac{1}{sex \: x}$$

$$tan \: x = \frac{1}{cot \: x}$$

$$ctan \: x = \frac{1}{tan \: x}$$

$$sec \: x = \frac{1}{cos \: x}$$

$$csc \: x = \frac{1}{sen \: x}$$

$$tan \: x = \frac{sen \: x}{cos \: x}$$

$$cot \: x = \frac{cos \: x}{sen \: x}$$

$$sen^2x+cos^2x=1$$

$$cos^2x+sen^2x=1$$

$$sen^2x=1-cos^2x$$

$$cos^2x=1-sen^2x$$

$$sen^2x=1+tan^2x$$

$$tan^2x=sec^2x-1$$

$$csc^2x=1+ctan^2x$$

$$ctan^2x=csc^2x-1$$