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​Q5: Question – Paper 3 – June 2018
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Question
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5)
​ABC is a right-angled triangle.
a) Work out the size of angle ABC. Give your answer correct to 1 decimal place.
[2 marks]

The length of the side AB is reduced by 1 cm.

The length of the side BC is still 7 cm.
Angle ACB is still 90°

b) Will the value of cos ABC increase or decrease?
​You must give a reason for your answer.
[1 mark]