Teaching Jharkhand (JSSC) TGT (6 to 8) Mock Test 2023-24 Mathematics Three Dimensional Geometry Angle with Planes
सदिश विधि से दो तलों 2x + y - 2z = 3 और 3x - 6y - 2z = 9 के बीच का कोण ज्ञात कीजिए?
1
cos–1\((\frac{16}{21})\)
2
cos–1\((\frac{4}{21})\)
3
cos–1\((\frac{4}{7})\)
4
cos–1\((\frac{8}{21})\)