engineering recuitment NFC Chemical Plant Operator Mock Test Mathematics Trigonometry Trigonometric Functions
cos 15° - cos 165° का मान ज्ञात कीजिए।
1
\(\dfrac{\sqrt3 + 1}{2}\)
2
\(\dfrac{\sqrt3 - 1}{\sqrt2}\)
3
\(\dfrac{\sqrt3 + 1}{\sqrt2}\)
4
\(\dfrac{\sqrt3 - 1}{2}\)