šŸ“¢ Too many exams? Don’t know which one suits you best? Book Your Free Expert šŸ‘‰ call Now!

  • google app store apple app store
  • āœ–

      Question

      If sin 2a = (3/4), then find the value of (sin a + cos

      a).
      A √7 / 2 Correct Answer Incorrect Answer
      B 1 Correct Answer Incorrect Answer
      C √5 / 2 Correct Answer Incorrect Answer
      D √6 / 2 Correct Answer Incorrect Answer

      Solution

      sin 2a = (3/4)
      Adding 1 to both sides, we get;
      1 + sin 2a = (7/4)
      We know that (sin²a + cos²a) = 1 and (sin 2P = 2 sinP cosP)
      sin²a + cos²a + 2 sin a cos a = (7/4)
      (sin a + cos a)² = (7/4)
      (sin a + cos a) = √7/2

      Practice Next

      Relevant for Exams:

      ask-question