Precalculus Quiz

Simplify (sec²x)(1 - sin²x)

• -cos(x)

• 1

• -1

• -sin(x)

Tags

TEKS.MATH.P.5M

Use Sum or Difference Identities to find the exact value of each expression.

cos(75°)

• 1/4

• √6/4 - √2 / 4

• √6 + √2 / 4

• -√6/4 - √2 / 4

Tags

CCSS.HSF.TF.C.9

Tags

TEKS.MATH.P.5M

Tags

TEKS.MATH.P.5M

Tags

TEKS.MATH.P.5M

Tags

TEKS.MATH.P.5M

sin2u =

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

Tags

CCSS.HSF.TF.C.9

If cosx = - 4/5, find secx.

• -5/4

• -3/5

• 5/3

• √3/2

Tags

CCSS.HSF.TF.C.8

Which identity represents a double-angle identity for sin 2θ?

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

Tags

CCSS.HSF.TF.C.9

 $\cot^2\ x+1\ =$  

•  $\sin^{2\ }x$  

•  $\csc^{2\ }x$  

•  $\cos^{2\ }x$  

• 1