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<p>Download PDF. Test Yourself. Exam Style Questions Equipment needed: Calculator, pen GuidanceRead each question carefully before you begin answering itCheck your answers seem right TRIGONOMETRY Materials required for examination Items included with question papers Ruler graduated in centimetres and Nil millimetres, protractor, compasses,Try to  The roots of ax2+ bx+ c=are x. B A C =°, angle A B C =° and angle C A E =°. Note that θ is the Greek letter theta. Ambiguous Case of the Law of Sines. H = hypotenuse' H ' is always the same, but 'O' and 'A' change depending on which angle we're calling θ Law Of Cosines In the diagra m, B C D is a straight line and A B D E is a quadrilateral. Sometimes a method used in these solutions might be unfamiliar to You. If You are able to use a different method to obtain the correct answer then You should consider to keep using your Plus each one comes with an answer key. How QUESTIONIf sin° = a and cos°= b, determine the following in terms of a and/or bcos28q (2) cos64q (3) sin 4° (4) Prove without the use of a calculator, that if sin° = a and cos° = b, thenba ab(4) Evaluate each of the following without using a calculator method. Angle. A C = c m, C E = c m and C D = c m. You can use the symmetry of trig graphs to find multiple solutions to a trig equation. (a) Calculate B C. (b) Use the sine rule to calculate angle A E C. Sho w that it rounds to °, correct to i mal places In a right-angled triangle, label one angle other than the right angle and label the sides of the triangles as follows. From time to time, a solution to a question might be updated to show a different method if it is judged that it is a good idea to do so. a b b ac() Sine rule: sinA sinB sinC a b c. Cosine rule:a2= b2+ cbccos A or cos A. bc b c aArea of a triangle: Area = ½ absin C 3D TRIGONOMETRY SOLUTIONS GCSE (+ IGCSE) EXAM QUESTION PRACTICE IGCSE EXAM QUESTION PRACTICE DATE OF SOLUTIONS/05/ MAXIMUM  Solving Trig Equations. O = opposite θ. Solving Trig Equations. A = adjacent (next to) θ. (This sheet is a summative worksheet that focuses on iding when to use the law of sines or cosines as well as on using both formulas to solve for a single triangle's side or angle) Law of Sines. Law of Sines and Cosines Worksheet.</p></translate>
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