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Use a Calculator to Solve the Equation on the Interval 0θ<2π0 \leq \theta < 2 \pi

question 54

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Use a calculator to solve the equation on the interval 0 0θ<2π0 \leq \theta < 2 \pi . Round the answer to two decimal places.
- cosθ=0.55\cos \theta = - 0.55


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