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What is the measurement of angle A to the nearest degree? 

 

 

 

 

Calculate the value of x to one decimal place.

Guest Dec 12, 2017
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 #1
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We can use the Law of Sines for the first one

 

Sin A  / 7  =  sin (95) / 9

 

Sin A  =    7 sin (95)/ 9

 

Use the sine inverse

 

arcsin ( 7 sin (95)/ 9 )  =  A  ≈  51°

 

 

For the second, we can use the Law of Cosines

 

x  =  sqrt  [  3^2 + 7^2  - 2(3)(7)cos (54)  ]    ≈  5.8

 

 

cool cool cool

CPhill  Dec 12, 2017

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