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  1. Given that

    f(θ)=33cos⁡θ−3sin⁡θ

    can be expressed in the form

    ncos⁡(θ+πn)

    for some n∈N, find the value of n.

  2. Solve the equation

    5cos⁡θ+3tan⁡θ=33,0<θ<2π