Mathematics and Mathematical Literacy - Thutong
Mathematics and Mathematical Literacy - Thutong
Mathematics and Mathematical Literacy - Thutong
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<strong>Mathematics</strong>(NSC)/Grade 11/ P2 25 ExemplarQUESTION 8While you are on the beach you st<strong>and</strong> at the base of a life-guards’ tower, B, <strong>and</strong> measurethe angle of elevation of a lighthouse, PT, to be y. From the top of the 5 m high lifeguards’tower, A, the angle of elevation of P is x.PA5mBxyT8.1 Find the size of APˆ B in terms of x <strong>and</strong> y. (2)8.2 Show thatPB =5cos xsin( y − x)(3)8.3 Hence show thatPT=5cos x.sinysin( y − x)(2)[7]Copyright reserved