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**1. In the diagram above, IJK and JML are straight lines.**Given that tan x= 2, JL=14cm and IK= 10cm, calculate the length, in cm, of LM.**Solution:**In 7cm Given that, IK=10cm**3cm**7cm**2. In the diagram, KLM is a straight line. Which of the**angles, A, B, C or D has a sine value of ?**3. In the diagram, QTS is a straight line and QT=3TS.**Calculate the value of cos x.