Tushar Tripathi
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Poll

If A and B are acute angles such that sin (A – B) = 0 and 2cos(A + B) – 1 = 0, thenA =

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Poll Results

0%60°
100%30° ( 5 voters )
0%45°
0%15°
Based On 5 Votes

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Prepare for Class 10th Maths using NCERT solutions and MCQ-based questions from Chapter 9 Some Applications of Trigonometry. Practice exercise questions short-answer problems and clear explanations to understand concepts like heights and distances in real-life scenarios. These resources are crafted as per the CBSE syllabus for effective exam preparation. Consistent practice will enhance your problem-solving skills and help you excel in board exams. Utilize step-by-step solutions and revision notes designed to guide students toward success. Start solving now!

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1 Answer

  1. Given:
    1. sin(A – B) = 0 ⇒ A – B = 0° ⇒ A = B.
    2. 2cos(A + B) – 1 = 0 ⇒ cos(A + B) = 1/2 ⇒ A + B = 60°.

    Substitute A = B into A + B = 60°:
    2A = 60° ⇒ A = 30°.
    This question related to Chapter 8 Mathematics Class 10th NCERT. From the Chapter 8 Introduction to Trigonometry. Give answer according to your understanding.

    For more please visit here:
    https://www.tiwariacademy.in/ncert-solutions/class-10/maths/

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