Q1Short answer (reasoning)Exercise 8.1
1 We know that a− ≥ 0 or a + ≥ 2 , but sinθ is not greater than 1. a a Alternatively, there exists the following three posibilities : Case 1. If a < 1, then a + >1 Case 2. If a = 1, then a + >1 Case 3. If a > 1, then a + >1 However, sin θ cannot be greater than 1. INTRODUCTION TO TRIGONOMETRY AND ITS APPLICATIONS 93
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(B)