1.7.9 Solve simple trigonometric equations

a.

Sketch the graph of

\cos 2x

for $\le x \le \frac{3\pi}{2}$ .

[3]

b.

The equation

\cos 2x = k

has exactly two solutions for the interval $\le x \le \frac{3\pi}{2}$ . State the possible values of $k$ .

[1]

a.

Sketch the graph of

\cos 2x

for $\le x \le \frac{3\pi}{2}$ .

[3]

b.

The equation

\cos 2x = k

has exactly two solutions for the interval $\le x \le \frac{3\pi}{2}$ . State the possible values of $k$ .

[1]

1.7.9 Solve simple trigonometric equations Questions