Gr 10 Math Ch 4: Calculator Skills

What is the first step to calculate trigonometric ratios on a calculator?

Input the angle directly without any conversion.

Make sure the calculator is set to 'radians' mode.

Ensure the calculator is in 'degrees' mode. (correct)

Select the appropriate trigonometric function before entering the angle.

Which of the following represents the correct way to express the square of the sine function?

sin² θ = sin(sin θ)

sin² θ = (sin θ) - (sin θ)

sin² θ = sin θ * sin θ (correct)

sin² θ = (sin θ) + (sin θ)

To calculate the value of sec 34°, which trigonometric function must be used?

sin 34°

tan 34°

The calculation cannot be performed directly.

cos 34° (correct)

If a calculator is used to determine sin 55°, which command would likely be executed?

Press sin and then enter 55. Signup and view all the answers

What is a common misconception when using trigonometric ratios in calculations?

Reciprocal ratios can be easily calculated without conversion. Signup and view all the answers

What must be ensured before performing trigonometric calculations on a calculator?

The calculator must be in ‘degrees’ mode. Signup and view all the answers

Which of the following represents the correct transformation when calculating reciprocal trigonometric functions?

sec θ = 1/cos θ Signup and view all the answers

Which expression is equivalent to sin² 45°?

(sin 45°)² Signup and view all the answers

When calculating sin 30°, which command would a typical calculator user input?

sin(30) Signup and view all the answers

Which statement is true regarding trigonometric ratios?

Only sine, cosine, and tangent can be calculated directly on calculators. Signup and view all the answers

What should you verify about your calculator before calculating trigonometric ratios?

That it is in 'degrees' mode. Signup and view all the answers

What must be done to calculate the value of a reciprocal trigonometric ratio?

Convert the ratio to one of the standard trigonometric functions. Signup and view all the answers

Which expression correctly illustrates the square of the cosine function?

Both A and B Signup and view all the answers

If a calculator is set to degrees mode, what would be the expected result of calculating sin 0°?

0 Signup and view all the answers

Which of the following statements regarding trigonometric calculations is false?

The sine and cosine functions can yield values outside the range [-1, 1]. Signup and view all the answers

Gr 10 Math Ch 4: Calculator Skills

Questions and Answers