Understanding Trigonometric Functions and Calculators

Mr. Oz Lee explains how to find reciprocal ratios, specifically the secant, using a calculator. He begins by introducing reciprocal ratios in trigonometry, such as secant, cosecant, and cotangent, and their relation to inverse functions of sine, cosine, and tangent. The video provides a step-by-step guide on setting up a calculator to work in degrees and calculating the secant of a given angle. An alternative method using the calculator's answer function is also demonstrated. The video concludes with an invitation to explore more math help on the channel.

What is the primary focus of reciprocal ratios in trigonometry?

• Finding angles

• Calculating distances

• Solving algebraic equations

• Inverse functions of trig ratios

Which of the following is NOT a reciprocal trigonometric function?

• Sine

• Secant

• Cotangent

• Cosecant

What is the reciprocal of the sine function?

• Tangent

• Cotangent

• Cosecant

• Secant

What is the reciprocal of the tangent function?

• Sine

• Cosecant

• Cotangent

• Secant

What is the reciprocal of cosine?

• Cosecant

• Secant

• Tangent

• Cotangent

How is the secant function related to the cosine function?

• Secant is the sum of cosine

• Secant is the reciprocal of cosine

• Secant is the difference of cosine

• Secant is the square of cosine

What is the first step in finding the secant of an angle using a calculator?

• Calculate the sine

• Set the calculator to degree mode

• Switch to radian mode

• Enter the angle

Why is it important to ensure the calculator is in degree mode?

• To avoid working in radians

• To increase accuracy

• To simplify calculations

• To save battery

What should you do if the calculator screen has burnt-out pixels?

• Reset the calculator

• Replace the calculator

• Use a different calculator

• Ignore and proceed

What is the formula used to calculate secant using cosine?

• Secant = cosine - 1

• Secant = cosine + 1

• Secant = 1 / cosine

• Secant = cosine * angle