Trigonometry Quiz #2

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

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

Write the following expression as the sine, cosine, or tangent of an angle.
cos(175)cos(55)+sin(175)sin(55)

• sin(120)
• cos(120)
• cos(230)
• sin(230)

Tags

CCSS.HSF.TF.C.9

Using the first identity, find Sin(180)

• 2sin(90)cos(90)
• 2sin(180)cos(180)
• sin(90)cos(90)
• sin(180)cos(180)

Use the information about the angle θ, 0≤θ<2π to find the exact value of
sin (2θ)
1. sin θ= 3/5 , 0<θ<π/2

• 24/7
• 7/25
• 24/25
• 1/2

Use the information about the angle θ, 0≤θ<2π to find the exact value of 
sin (θ/2)
2. sin θ= 3/5 , 0<θ<π/2

• √10/10
• 24/25
• 25/7
• -7/25

Simplify.

• csc²θ
• sec²θ
• cscθ
• 1

Simplify.

• sinθ
• cot²θ
• tan²θ
• cos²θ

• -1
• sin θ
• csc θ
• 1

What is the value of sin210^ocos30^o - cos210^osin30^o is

• 0
• -1
• 1
• sin240^o