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Ka-B Q(x,y) 2.5. Equate the value of PQ in 2.3 and 2.4 and make cos(a-) the subject of the formula. 2.6. Use the results
Ka-B Q(x,y) 2.5. Equate the value of PQ in 2.3 and 2.4 and make cos(a-) the subject of the formula. 2.6. Use the results obtained in 2.5 to show that: cos(a+) = cos a. cos + sin a. sin (3) (4)
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