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Ch. 2 - Graphs of the Trigonometric Functions; Inverse Trigonometric Functions
Blitzer - Trigonometry 3rd Edition
Blitzer3rd EditionTrigonometryISBN: 9780137316601Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBlitzer 3rd EditionCh. 2 - Graphs of the Trigonometric Functions; Inverse Trigonometric FunctionsProblema 27
Capitolo 2, Problema 27

In Exercises 27–38, use a calculator to find the value of each expression rounded to two decimal places. sin⁻¹ 0.3

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Recognize that the expression sin⁻¹ 0.3 represents the inverse sine function, also called arcsine, which gives the angle whose sine is 0.3.
Recall that the inverse sine function is denoted as \(\sin^{-1}(x)\) or \(\arcsin(x)\), and it returns an angle in radians or degrees depending on your calculator settings.
Set your calculator to the desired angle mode (degrees or radians) depending on the problem requirements. Usually, degrees are used unless otherwise specified.
Input the value 0.3 into the inverse sine function on your calculator, i.e., calculate \(\sin^{-1}(0.3)\) or \(\arcsin(0.3)\).
Read the result from the calculator and round it to two decimal places as requested.

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Inverse Sine Function (sin⁻¹ or arcsin)

The inverse sine function, denoted as sin⁻¹ or arcsin, returns the angle whose sine value is a given number. It is used to find an angle when the sine value is known, with the output angle typically in the range of -90° to 90° (or -π/2 to π/2 radians).
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Inverse Sine

Using a Calculator for Trigonometric Functions

Calculators can compute inverse trigonometric functions by inputting the value and selecting the appropriate function (e.g., sin⁻¹). It is important to ensure the calculator is set to the correct angle mode (degrees or radians) before calculating to get the desired unit for the answer.
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How to Use a Calculator for Trig Functions

Rounding Decimal Values

Rounding involves approximating a number to a specified number of decimal places for simplicity and clarity. In this problem, the result of sin⁻¹(0.3) should be rounded to two decimal places, meaning the answer is expressed with two digits after the decimal point.
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Sine, Cosine, & Tangent of 30°, 45°, & 60°
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