Exam (elaborations)
Sine Cosine Area of Triangle
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Sine Cosine Area of Triangle
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Materials
For this paper you must have:
Ruler
Pencil, Rubber, Protractor and Compass
Scientific calculator, which you are expected to use when appropriate
Instructions
Answer all questions
Answer questions in the space provided
All working must be shown
Do all rough work in this book. Cross out any rough work you don't want to be marked
Information
The marks for the questions are shown in brackets
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, Leave
A blank
1 Diagram NOT
accurately drawn
7 6°
12 cm
9 cm
B
C
In triangle ABC,
AC = 9 cm,
AB = 12 cm,
Angle CAB = 76°.
(a) Calculate the area of the triangle.
Give your answer correct to one decimal place.
……………………. cm
(b) Calculate the length of BC. (2)
Give your answer correct to 3 significant figures.
……………………. cm
(2)
(Total for question 1 is 4 marks)
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