Quantitative Aptitude Trigonometry Circular Measure of Angles

2cosA cosB = cos(A + B) + cos(A – B) ஐப் பயன்படுத்தி, cos75°cos15° இன் மதிப்பைக் கண்டறியவும்.

1
\(\frac{1}{2}\)
2
\(\frac{1}{4}\)
3
\(\frac{{\sqrt 3 }}{2}\)
4
\(\frac{{\sqrt 3 }}{4}\)

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