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1.5 Trigonometry

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Question 19

In triangle $A B C$ , side $AB\,$ has length 5 cm, side $BC\,$ has length 9 cm and side $AC\,$ has length 7 cm.

Find the cosine of angle $A C B$ , giving your answer as a fraction in its simplest form.

[2]

Find the exact area of the triangle.

[3]

Markscheme

1.5 Trigonometry Questions

A Level
Maths
1.5 Trigonometry

97 exam-style questions on WJEC A Level Maths 1.5 Trigonometry, covering 1.5.1 Trigonometry, 1.5.2 Trigonometry, 1.5.3 Trigonometry, 1.5.4 Trigonometry, and 1.5.5 Trigonometry. Each one has a worked solution and a mark scheme showing where the marks go.

1.5 Trigonometry

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1.5 Trigonometry

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Question 19

In triangle $A B C$ , side $AB\,$ has length 5 cm, side $BC\,$ has length 9 cm and side $AC\,$ has length 7 cm.

Find the cosine of angle $A C B$ , giving your answer as a fraction in its simplest form.

[2]

Find the exact area of the triangle.

[3]

Markscheme

1.5 Trigonometry Questions

A Level
Maths
1.5 Trigonometry