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35 votes
Find the angle that is between 0 and 2\Pi radians that is coterminal to \frac{44\Pi}{9} radians.The coterminal angle is \frac{a\Pi}{b} radianswhere the value for a is: Answerand the value for b is: Answer

Find the angle that is between 0 and 2\Pi radians that is coterminal to \frac{44\Pi-example-1
User Himani Sharma
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1 Answer

16 votes
16 votes

Solution

To find coterminal angles we add 2pi n

to the angle, where n is some integer, positive, negative, or zero.

Therefore when we find n, the answer will be


(44\pi)/(9)+2\pi\cdot n

Since we want the coterminal angle to be between 0 and 2pi,

we write an inequality which indicates that:


\begin{gathered} 0<(44\pi)/(9)+2\pi\cdot n<2\pi \\ \text{ Dividing all through by }\pi \\ \Rightarrow0<(44)/(9)+2\cdot n<2 \\ \text{ Multiply all through by }9 \\ \Rightarrow0<44+18n<18 \\ \\ \Rightarrow-44<18n<18-44 \\ \\ \Rightarrow-44<18n<-26 \\ \Rightarrow-(22)/(9)when n = -1[tex]\Rightarrow(44\pi)/(9)+2\pi\cdot n=(44\pi)/(9)-2\pi=(26)/(9)\pi

Hence, the value of a is 26

and the value of b is 9

User Thilak Raj
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3.0k points