18.2 Sine and Cosine Ratios

What are complementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect.

Tags

CCSS.HSG.SRT.C.7

What is the complement to: cos 40⁰ = ?

• sin 50⁰

• cos 50⁰

• tan 50⁰

• sin 40⁰

Tags

CCSS.HSF.TF.C.8

What is the complement to: sin 20⁰ = ?

• cos 70⁰

• sin 70⁰

• cos 20⁰

• tan 20⁰

Tags

CCSS.HSF.TF.C.9

What is the complement to: cos 38⁰ = ?

• sin 62⁰

• sin 52⁰

• cos 52⁰

• sin 38⁰

Tags

CCSS.HSF.TF.C.9

What is the complement to: sin 1⁰ = ?

• cos 89⁰

• cos 1⁰

• sin 89⁰

• tan 1⁰

Tags

CCSS.HSF.TF.C.9

What is the complement angle to 12°?

• 78°
• 68°
• 168°
• 90°

Tags

CCSS.HSG.SRT.C.7

If sin(β) = ⅝ . What is cos(α)?

• ^⅜

• ⅛

• ⅝

• ⅞

Tags

CCSS.HSF.TF.C.8

What is the missing number?
sin(60) = cos(   )

• 10
• 20
• 30
• 40

Tags

CCSS.HSF.TF.C.8

What is the missing number?
Sin(   ) = Cos(80)

• 5
• 10
• 15
• 20

Tags

CCSS.HSF.TF.C.8

What is the missing number?
Sin(    ) = Cos (89)

• 0
• 1
• 2
• 3

Tags

CCSS.HSF.TF.C.8