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IceJOKER [234]
3 years ago
15

Find a. Round to the nearest tenth:

Mathematics
1 answer:
shusha [124]3 years ago
8 0
You first need to find the last angle measurement which is
60 because 60+15+105= 180

Sin60 Sin105
——— = ———— Cross multiply
a 2

Sin60 * 2 = Sin105*a

1.7 = Sin105*a Divide both sides by sin105

1.79 = a

1.8 ≈ a
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Leona [35]
This looks complicated

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By multiplying top and bottom by the conjugate:-

left side  =  (5-3i)(x + iy) (4+5i)          (5-3i)(x + iy) (4+5i) 
                  ------------------------   =      ------------------------
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5-3i is common so:-

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