Sine and Cosine Trig Complimentary Angles

State a Pythagorean Identity

• a²+b²=c²

• sin²x+cos²x=1

• tan x=sin/cos

• sin x =1/cosx

Which function is the reciprocal of the sine?

• cosine

• secant

• cotangent

• cosecant

The cosine of an acute angle in a triangle is the ratio of which two of its sides?

• opposite/adjacent

• adjacent/hypotenuse

• opposite/hypotenuse

• hypotenuse/adjacent

The sine of an acute angle in a triangle is the ratio of which two of its sides?

• opposite/adjacent

• adjacent/hypotenuse

• opposite/hypotenuse

• adjacent/opposite

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 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

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.

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 y, what must be true about x and y?

• x + y = 90⁰

• x = y 

• x = 2y

cos 38⁰ = sin θ. What is θ ?

• 62⁰

• 52⁰

• 38⁰