Explanation Result used: “The laws of Cosines are, a 2 = b 2 + c 2 − 2 b c cos A b 2 = c 2 + a 2 − 2 c a cos B c 2 = a 2 + b 2 − 2 a b cos C .” “The laws of Sines are, sin A a = sin B b = sin C c .” Calculation: It is given that, the value of a = 1.25 cm , b = 5.08 cm , and c = 3.96 cm . The largest side is b . Substitute the given values in law of cosines and obtain B. b 2 = c 2 + a 2 − 2 c a cos B 2 c a cos B = c 2 + a 2 − b 2 cos B = c 2 + a 2 − b 2 2 c a On further simplification, cos B = ( 3.96 ) 2 + ( 1.25 ) 2 − ( 5.08 ) 2 2 ( 3

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ISBN: 8220100803055

Author: SAUNDERS

Publisher: PEARSON

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Chapter 10.4, Problem 15AE

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Chapter 10 Solutions

EBK MATHEMATICS FOR THE TRADES

Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Prob. 7AE Ch. 10.1 - Label the shaded angles as acute, obtuse, right,...Ch. 10.1 - Prob. 9AE Ch. 10.1 - Prob. 10AE

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The triangle with given information.

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To solve: The triangle with given information.

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