Trig Identities

Solve the following for cos²θ:
sin²θ + cos²θ = 1

• cos²θ = 1 - sin²θ
• cosθ = 1 + sin²θ
• cosθ = 1 - sinθ
• cos²θ = Adj/hyp

Tags

CCSS.HSF.TF.C.8

• 1

• -1

What happens when you multiply two reciprocal functions?

• You get a pythagorean identity

• It equals 1

• You get a quotient identity

• It equals 0

Tags

CCSS.HSF.TF.C.8

Please select the correct solution 
cos ² x + sin ² x=  

• 1
• csc ² x + sec ² x
• sin ² x
• 1 - sin ² x

Is this a pythagorean identity?
tan²x + 1 = secx

• Yes
• No

What is the reciprocal function of sin(x)?

• sec(x)

• cos(x)

• cot(x)

• csc(x)

Tags

CCSS.HSF.TF.A.2