Solve, for 0°⩽x<180°0° \leqslant x < 180°0°⩽x<180°, the equation cos(2x+15°)=0.3\cos(2x + 15°) = 0.3cos(2x+15°)=0.3
Give your answers to 1 decimal place.
42 exam-style questions on WJEC A Level Maths 1.5.5 Trigonometry. Each one has a worked solution and a mark scheme showing where the marks go.