Sine Cosine Complements

If sin(β) = ⅝ . What is cos(α)?

• ^⅜

• ⅛

• ⅝

• ⅞

Solve for x. cos(2x +9) = sin(x)

• x = 27

• x = -9

• x = 57

• x = 9

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 true in respect to the relationship of the sine and cosine of complementary angles? A and B are the acute angles of the right triangle.

• Cos (37)

• 12/15

• Sin (37)

• 15 * Sin(37)

If sin x = cos y, what must be true about x and y?

• x + y = 90⁰

• x = y 

• x = 2y

Select all that apply: What is true in respect to the relationship of the sine and cosine of complementary angles? A and B are the acute angles of the right triangle.

If sin x = cos x, what is the value of x?

• 45⁰

• 90⁰

• 30⁰

Select all that apply: What is true in respect to the relationship of the sine and cosine of complementary angles? A and B are the acute angles of the right triangle.