Unit 3 Trig Review

Front

In a right triangle, if sin A = 17/31, what is the value of cos B?

Back

17/31 (Since ∠A and ∠B are complementary, sin A = cos B)

Front

What is the formula to find the area of an equilateral triangle?

Back

Area = (√3/4) * side²

Front

For what value of Ɵ is sin Ɵ = cos 32?

Back

Ɵ = 58 degrees (since sin Ɵ = cos(90 - Ɵ))

Front

What is the ratio for COS X in a right triangle?

Back

Adjacent/Hypotenuse

Front

Find the area of an equilateral triangle with a side length of 20 feet.

Back

100√3 square feet

Front

What is the relationship between sine and cosine for complementary angles?

Back

sin A = cos(90 - A) and cos A = sin(90 - A)

Front

If sin A = 0.5, what is cos A?

Back

√(1 - sin²A) = √(1 - 0.25) = √0.75 = √3/2

Front

What is the Pythagorean theorem?

Back

a² + b² = c² (where c is the hypotenuse) in a right triangle.

Front

What is the value of sin 30 degrees?

Back

1/2

Front

What is the value of cos 60 degrees?

Back

1/2