Trig Identities

Simplify:
sinθcotθ

• sinθ
• tanθ
• cosθ
• secθ

sin²θ+cos²θ=

• csc²θ
• sec²θ
• 1
• csc²θ - 1

Tags

CCSS.HSF.TF.C.8

Simplify.

• sinθ
• cot²θ
• tan²θ
• cos²θ

Tags

CCSS.HSF.TF.C.8

CCSS.HSG.SRT.C.8

Simplify:

csc(α)cos²(α) - csc(α)

• -1

• sin(α)

• -sin(α)

• tan(α)

sec²(y) - tan²(y)

• tan(y)

• 1

• -sin(y)

• -1

Tags

CCSS.HSF.TF.C.8

True or False, tan(x)cot(x) = 1?

• True

• False

Find the exact value of the expression.
sin(5π/12)cos(π/4) - cos(5π/12)sin(π/4)

• 1/2
• -1/2
• -√(2)/2
• √(3)/2

Tags

CCSS.HSF.TF.C.9

Find the exact value of the expression.
cos(20)cos(40) - sin(20)sin(40)

• 1/4
• 1/2
• √(3)/2
• √(3)

Tags

CCSS.HSF.TF.C.9

sin2u =

• (sinu)(cosu)
• 2(sinu)(cosu)
• (sinu)^2
• 2(sinu)^2

Tags

CCSS.HSF.TF.C.9

Which identity does not represent a double-angle identity for cos 2θ?

• 2sinθcosθ
• cos²θ - sin²θ
• 1 - 2sin²θ
• 2cos²θ - 1

Tags

CCSS.HSF.TF.C.9