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

Solve the following for tan²θ:
1 + tan²θ = sec²θ 

• tan²θ = sec²θ + 1
• tan²θ = sec²θ - 1
• tanθ = secθ - 1
• tan²θ = opp/adj

Rewrite tan(x) in terms of sin(x) and cos(x).

• tan(x) = cos(x)/sin(x)
• tan(x) = 1/cot(x)
• tan(x) = sin(x)/cos(x)
• tan(x) = opp/adj

Tags

CCSS.HSF.TF.C.8

What is csc(x) equivalent to?

• 1/sin(x)
• 1/tan(x)
• sin(x)
• 1/cos(x)

Tags

CCSS.HSF.TF.A.4

Please select the correct solution

• csc² x
• cot² x
• sin² x
• sec² x

Please select the correct solution

• csc x
• sec x
• cot x
• tan x

Is this a pythagorean identity?
tan²x + 1 = secx

• Yes
• No

sin x =

• cos x

• 1/cosx

• 1/secx

• 1/cscx

Tags

CCSS.HSF.TF.A.4

cos x =

• sin x

• sin²x-1

• 1/sec x

• 1/csc x

Tags

CCSS.HSF.TF.C.8

sec x =

• 1/cosx

• 1/sinx

• 1/cscx

• 1/tanx

Tags

CCSS.HSF.TF.A.2