Trig Identities

sinθ

secθ

cotθ

cscθ

tanθ

$$\sin^2\theta+\cos^2\theta=1$$

$$\cos^2=1-\sin^2\theta$$

$$\sin^2\theta=1-\cos^2\theta$$

$$\sin^2\theta+1=-\cos^2\theta$$

$$\sin\theta+\cos\theta=\frac{1}{2}$$

$$\cot^2\theta=\csc^2\theta-1$$

$$1=\csc^2\theta-\cot^2\theta$$

$$\cot^2\theta+\csc^2\theta=1$$

$$\cot^2\theta-\csc^2\theta=1$$

$$1=\sec^2\theta-\tan^2\theta$$

$$\tan^2\theta=\sec^2\theta-1$$

$$\tan^2\theta+\sec^2\theta=1$$

$$\sec\theta-\tan\theta=1$$

$\sin\theta$

$\cos\theta$

$\cos\left(90^o-\theta\right)$

$-\cos\theta$

$$\tan\theta$$  

$$\cot\theta$$  

$$\cot\left(90^o-\theta\right)$$  

$$\sin\theta$$  

$$\tan\theta$$  

$$\sec\theta$$  

$$\csc\theta$$  

$$\cot\theta$$  

$$\tan\theta$$  

$$\cos\theta$$  

$$\sec\theta$$  

$$\csc\theta$$