state gov APSSB CHSL Mock Test 2024 Quantitative Aptitude Trigonometry Circular Measure of Angles

2cosA cosB = cos(A + B) + cos(A – B) का प्रयोग करके, cos75°cos15° का मान ज्ञात कीजिए।

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