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Shtirlitz [24]
2 years ago
11

Which is not a solution of sin 20 = 1? A = 90 B = 45 C = 225 D = - 135

Mathematics
1 answer:
koban [17]2 years ago
6 0
If you plug in 90 into theta, the expression becomes sin(180), which has a value of zero. Therefore 90 cannot be a solution to this equation. Hope this helps.
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Angle ABD and angle DBC are linear pairs, and angle ABD and angle EDC are vertical angles. If the measure of angle ABD=5(2x+1),
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∠ ABD = 5(2X+1)
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∠ ABD and ∠ DBC are linear pairs
∴ ∠ ABD +∠ DBC = 180
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∴ x = 13
∴∠ ABD = 5(2X+1) = 5(2*13+1) = 135
  ∠ DBC = 3x+6  = 3*13+6 = 45

∠ ABD  and ∠ EBC are vertical angles
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The <span>statements that are true:
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C.) x=13
E.)measure of angle EBC =135
F.) angle DBC and angle EBC are linear pairs </span>




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