Q. Which of the following is equivalent to the value of (95π+1813π−617π) when converted to degrees?(A) 20∘(B) 80∘(C) 280∘(D) 320∘
Convert to degrees: Convert each term in the expression to degrees separately.The conversion factor from radians to degrees is 180∘/π. We will apply this to each term in the expression.
Convert 5π/9: Convert the first term 5π/9 to degrees.(5π/9)×(180°/π)=5×20°=100°
Convert 1813π: Convert the second term 1813π to degrees.\left(\frac{\(13\)\pi}{\(18\)}\right) \times \left(\frac{\(180\)°}{\pi}\right) = \(13 \times 10° = 130°
Convert −617π: Convert the third term −617π to degrees.(-\frac{\(17\)\pi}{\(6\)}) \times (\frac{\(180\)°}{\pi}) = \(-17 \times 30° = −510°
Add converted values: Add the converted degree values from steps 2, 3, and 4.100∘+130∘−510∘=230∘−510∘=−280∘
Adjust negative result: Since the result is negative, we can add 360° to find the equivalent positive angle, if necessary.−280°+360°=80°
Choose correct option: Choose the correct option that matches the calculated degree value.The correct option is 80∘, which corresponds to option B.
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