Exact Mode Calculations on T89

This tutorial reviews the exact mode of the T89 graphing calculator, explaining how to access and switch between modes. It demonstrates performing calculations in exact mode, including fractions, radicals, and trigonometric functions. The video also covers converting decimals to fractions and using logarithms, highlighting the calculator's ability to provide exact values and decimal approximations.

What key do you press to access the mode settings on the T89 calculator?

• Catalog

• Diamond

• Home

• Mode

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In exact mode, what form does the calculator give the sum of 1/2 and 2/3?

• Decimal

• Improper fraction

• Mixed number

• Percentage

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How can you obtain a decimal approximation of a result in exact mode?

• Pressing F2

• Pressing Diamond Enter

• Pressing Home

• Pressing Mode

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What should you check before calculating the sine of an angle?

• The calculator is in radian mode

• The calculator is in automatic mode

• The calculator is in degree mode

• The calculator is in approximation mode

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What is the approximate decimal value of sin(π/3) in exact mode?

• 1.0

• 0.707

• 0.5

• 0.866

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What happens when you enter 0.12 in exact mode?

• It remains a decimal

• It converts to 1/8

• It converts to 3/25

• It converts to 1/10

How does the calculator simplify the square root of 150 in exact mode?

• 6√5

• 15√10

• 10√15

• 5√6

What is the result of 1/√3 in exact mode?

• 3/√3

• 1/3

• 1/√3

• √3/3

How do you access the common logarithm function on the T89 calculator?

• Pressing the log key

• Using the mode key

• Using the catalog

• Pressing second X

What is the decimal approximation of log(32) in exact mode?

• 1.505

• 1.515

• 1.525

• 1.535