Simplifying and verifying trig identities

Simplify

• secθ
• cos²θ
• sin²θ
• sin²θ/cos²θ

Simplify:  tanxcotx-cos²x

• tanx
• cotx
• sin²x
• cos²x

Is this a pythagorean identity?
tan²x + 1 = secx

• Yes
• No

*

• sin x
• cos x
• tan x
• csc x

• csc²θ
• sec²θ
• cscθ
• 1

• csc x
• sec x
• 1/sec x
• cos x

• cos²x
• sin²x
• cot²x
• tan²x

When verifying you must first ...

• pick a side to simplify 
• find a trig. identity 
• Change to sine and cosine
• Change Values

Simplify:  tanxcotx-cos²x

• tanx
• cotx
• sin²x
• cos²x

Simplify this to a basic trigonometry function:
tan(x)csc(x) 

• tanx
• secx
• cotx
• cscx