Trigonometric Identities and Equations

a.

Show that the equation

3\sin 2x \tan 2x = \cos 2x + 2

Can be written in the form

4\cos^2 2x + 2\cos 2x - 3 = 0

[4]

b.

Find all values for $x\,$ in the interval $\leq x < 180^\circ$ , for which

3\sin 2x \tan 2x = \cos 2x + 2

Give your answers to two decimal places.

[6]

a.

Show that the equation

3\sin 2x \tan 2x = \cos 2x + 2

Can be written in the form

4\cos^2 2x + 2\cos 2x - 3 = 0

[4]

b.

Find all values for $x\,$ in the interval $\leq x < 180^\circ$ , for which

3\sin 2x \tan 2x = \cos 2x + 2

Give your answers to two decimal places.

[6]

Trigonometric Identities and Equations Questions