puchie1225
20.12.2021 •
Mathematics
On the lines graphed at the right, points are identified at (-2,1)(2,-2) and (-1,-6). Which phrase describes the lines on the graph?
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Ответ:
b = 4 , c = 8
Step-by-step explanation:
Using the sine ratio in the right triangle and the exact value
sin30° = , then
sin30° = = = ( cross- multiply )
c = 8
Using Pythagoras' identity in the right triangle
b² + 4² = 8²
b² + 16 = 64 ( subtract 16 from both sides )
b² = 48 ( take the square root of both sides )
b = = = 4