Pre-Calc - Sum/Diff Identities & Simplifying Trig Expressions

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

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

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

Which of the following is NOT
a solution to
sin θ = √(3) / 2 ?

• π / 3
• 2π / 3
• 5π / 3
• 7π / 3

Tags

CCSS.HSF.TF.B.7

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

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9

Tags

CCSS.HSF.TF.C.9