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More Lessons for A Level Maths

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Examples, videos, solutions, activities, and worksheets that are suitable for A Level Maths.

How to solve trigonometric equations?

A-level Maths Edexcel C2 June 2008 Q9a

Solving a trig equation in a given range

Solve, for 0 ≤ x < 360°,

(a) sin(x - 20°) = 1/√2
A-level Maths Edexcel C2 June 2008 Q9b

Solving a trig equation in a given range

Solve, for 0 ≤ x < 360°,

(b) cos 3x = - 1/2

A-Level Maths Edexcel C2 January 2009 Q8a

(a) Show that the equation

4 sin^{2} x + 9 cos x – 6 = 0

can be written as

4 cos^{2} x – 9 cos x + 2 = 0.
A-Level Maths Edexcel C2 January 2009 Q8b

Worked solution to this question on trigonometry.

(b) Hence solve, for 0 ≤ x < 720°,

4 sin^{2} x + 9 cos x – 6 = 0,

giving your answers to 1 decimal place

More Lessons for A Level Maths

Math Worksheets

Examples, videos, solutions, activities, and worksheets that are suitable for A Level Maths.

How to solve trigonometric equations?

A-level Maths Edexcel C2 June 2008 Q9a

Solving a trig equation in a given range

Solve, for 0 ≤ x < 360°,

(a) sin(x - 20°) = 1/√2

Solving a trig equation in a given range

Solve, for 0 ≤ x < 360°,

(b) cos 3x = - 1/2

(a) Show that the equation

4 sin

can be written as

4 cos

Worked solution to this question on trigonometry.

(b) Hence solve, for 0 ≤ x < 720°,

4 sin

giving your answers to 1 decimal place

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