examday

Community mocks

Y and A Tutoring Paper 2 with Answers and Hints · Q6

Paper 2Logic & proofTrigonometryAlgebra

Consider the following attempt at finding the number of solutions to the equation 6sin⁡x=7sin⁡xcos⁡x6\sin x=\frac{7\sin x}{\cos x} for 0≤x≤360∘0\le x\le360^\circ.

I 6=7cos⁡x6=\frac7{\cos x}

II cos⁡x=76\cos x=\frac76

III There are no real solutions to this equation.

Which statement describes this attempt?

AIt is completely correct
BIt is incorrect and the first mistake occurs on line I
CIt is incorrect and the first mistake occurs on line II
DIt is incorrect and the first mistake occurs on line III

Read the questions freely. Sign in to check your answer, see the worked solution and save your progress.

Sign in to check your answerPractise the whole paper →