Trig Identities

Trig Identities

Memorize these basic Trig Identities

Pythagorean Identities

These can be rearranged in many ways...

Following are QUICK questions on these definitions...

Multiple Choice

reciprocal of cos is?

• sin

• csc

• sec

• cot

Multiple Choice

reciprocal of csc is?

• sin

• cos

• tan

• sec

Multiple Select

Which are equivalent to tan x?

• 1/cot x

• sinx/cosx

• cosx/sinx

• 1/tanx

Multiple Select

Which are equivalent to

 $\sin^2\theta$  

•  $\sin\theta\cdot\sin\theta$  

•  $\left(\sin\theta\right)^2$  

•  $\frac{1}{\csc^2\theta}$  

Multiple Choice

reciprocal of sin is?

• cot

• cos

• sec

• csc

Multiple Choice

tan x is equivalent to...

• sinx/cscx

• cosx/sinx

• sinx/cosx

• cotx

Multiple Select

 Which are equivalent to  $\cos^2x$  ?

•  $\frac{1}{\sin^2x}$  

•  $1-\sin^2x$  

•  $\frac{1}{\sec^2x}$  

•  $-\sin^2x\ +\ 1$