OCR C3 — Question 4

Exam BoardOCR
ModuleC3 (Core Mathematics 3)
TopicExponential Equations & Modelling

  1. Solve each equation, giving your answers in exact form.
    1. \(\mathrm { e } ^ { 4 x - 3 } = 2\)
    2. \(\quad \ln ( 2 y - 1 ) = 1 + \ln ( 3 - y )\)
    3. (i) Prove, by counter-example, that the statement
      "cosec \(\theta - \sin \theta > 0\) for all values of \(\theta\) in the interval \(0 < \theta < \pi\) " is false.
    4. Find the values of \(\theta\) in the interval \(0 < \theta < \pi\) such that
    $$\operatorname { cosec } \theta - \sin \theta = 2$$ giving your answers to 2 decimal places.