Explanation Verify the given relation as follows. Compute the value of sin 78.4 ° . Enter sin 78.4 ° in the Ti83 calculator and obtain its value as follows. From the above screenshot the value of sin 78.4 ° is observed to be 0.9795752496. Since, the given value of θ to the form of 0.1 ° so round off the value to three significant digits. Thus, the value of sin 78.4 ° is 0.980 . Similarly compute the value of 2 ( sin 39.2 ° ) ( cos 39.2 ° ) as shown below. From the above screenshot the value of 2 ( sin 39.2 ° ) ( cos 39.2 ° ) is observed to be 0

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Author: Washington

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Chapter 4.3, Problem 44E

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To verify: The relation sin78.4°=2(sin39.2°)(cos39.2°) using calculator.

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Chapter 4.3, Problem 43E

Chapter 4.3, Problem 45E

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Chapter 4 Solutions

Basic Technical Mathematics

Ch. 4.1 - Change 17°24′ to decimal form. Ch. 4.1 - Prob. 2PE Ch. 4.1 - Prob. 3PE Ch. 4.1 - Prob. 1E Ch. 4.1 - Prob. 2E Ch. 4.1 - Prob. 3E Ch. 4.1 - Prob. 4E Ch. 4.1 - Prob. 5E Ch. 4.1 - Prob. 6E Ch. 4.1 - Prob. 7E

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To verify: The relation sin 78.4 ° = 2 ( sin 39.2 ° ) ( cos 39.2 ° ) using calculator.

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To verify: The relation sin78.4°=2(sin39.2°)(cos39.2°) using calculator.

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Chapter 4 Solutions