Pre Calc Trig Review

Front

What is the formula for arc length in a circle?

Back

Arc Length = r * θ, where r is the radius and θ is the angle in radians.

Front

How do you find the missing side lengths in a right triangle?

Back

Use the Pythagorean theorem: a^2 + b^2 = c^2, where c is the hypotenuse.

Front

What is the value of u if u^2 = 256?

Back

u = 16 (since u must be positive).

Front

How do you find a positive co-terminal angle?

Back

Add or subtract 2π to the given angle.

Front

What does 'Soh Cah Toa' stand for in trigonometry?

Back

Soh Cah Toa helps remember the definitions of sine, cosine, and tangent: Soh = sin = opposite/hypotenuse, Cah = cos = adjacent/hypotenuse, Toa = tan = opposite/adjacent.

Front

What is the sine of an angle in a right triangle?

Back

Sine = opposite side / hypotenuse.

Front

What is the cosine of an angle in a right triangle?

Back

Cosine = adjacent side / hypotenuse.

Front

What is the tangent of an angle in a right triangle?

Back

Tangent = opposite side / adjacent side.

Front

How do you convert degrees to radians?

Back

Multiply degrees by π/180.

Front

How do you convert radians to degrees?

Back

Multiply radians by 180/π.