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17 December, 14:18

Solve the equation by factoring. (enter your answers as a comma-separated list. let k be any integer. round terms to three decimal places where appropriate. if there is no solution, enter no solution.) csc (θ) cot (θ) - sin (θ) tan (θ) = cos (θ)

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  1. 17 December, 14:30
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    Answer: There is no solution

    Step-by-step explanation:

    Given that

    csc (θ) cot (θ) - sin (θ) tan (θ) = cos (θ) ... (1)

    Where

    csc (θ) = 1/sin (θ)

    cot (θ) = 1/tan (θ) = cos (θ) / sin (θ)

    tan (θ) = sin (θ) / cos (θ)

    Substitute them in equation (1)

    1/sin (θ) * cos (θ) / sin (θ) - sin (θ) * sin (θ) / cos (θ) = cos (θ)

    Cos (θ) / sin^2 (θ) - sin^2 (θ) / cos (θ) = cos (θ)

    Cos (θ) / sin^2 (θ) = sin^2 (θ) / cos (θ) + cos (θ)

    Take the LCM of right hand side

    Cos (θ) / sin^2 (θ) = (sin^2 (θ) + cos^2 (θ)) / cos (θ)

    But sin^2 (θ) + cos^2 (θ) = 1

    Cos (θ) / sin^2 (θ) = 1 / cos (θ)

    Cross multiply

    Cos^2 (θ) = sin^2 (θ)

    Cos^2 (θ) - sin^2 (θ) = 0

    If θ = 45

    That means there's no solution
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