Sine and Cosine Complementary Angles

What are supplementary 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

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.

If cos α = sin β, what must be true about α and β?

• α and β are complementary angles
• α and β are congruent angles
• α and β are right angles
• α and β are supplementary angles

What is the complement to: cos 40⁰ = ?

• sin 50⁰

• cos 50⁰

• tan 50⁰

• sin 40⁰

What is the complement to: sin 20⁰ = ?

• cos 70⁰

• sin 70⁰

• cos 20⁰

• tan 20⁰

What is the complement to: cos 38⁰ = ?

• sin 62⁰

• sin 52⁰

• cos 52⁰

• sin 38⁰

What is the complement to: sin 1⁰ = ?

• cos 89⁰

• cos 1⁰

• sin 89⁰

• tan 1⁰

What is the supplement angle to 45°?

• 45°
• 180°
• 135°
• 100°

What is the complement angle to 12°?

• 78°
• 68°
• 168°
• 90°