cos3a-sin3a/cosa-sina=?
Correct answer: C. 2+sin2a/2
- A. 1+sina
- B. 1-sina
- C. 2+sin2a/2
- D. 1+cos2a/2
Explanation
Correct answer Is "C option" or "2+sin2a/2"Using the formula:a3-b3=(a-b)( a2+ab+b2)The question can be done as:2+sin2a/2Hence using all above calculations, The answer to the question is: 2+sin2a/2
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