मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएचएससी विज्ञान इयत्ता ११

Find aba→⋅b→ when aijka→=i^-2j^+k^ and bijkb→=3i^-4j^-2k^ - Mathematics

Advertisements
Advertisements

प्रश्न

Find `vec"a"*vec"b"` when `vec"a" = hat"i" - 2hat"j" + hat"k"` and `vec"b" = 3hat"i" - 4hat"j" - 2hat"k"`

बेरीज
Advertisements

उत्तर

`vec"a" = hat"i" - 2hat"j" + hat"k"` and `vec"b" = 3hat"i" - 4hat"j" - 2hat"k"`

`vec"a" * vec"b" = (hat"i" - 2hat"j" + hat"k")*(3hat"i" - 4hat"j" - 2hat"k")`

= (1)(3) + (– 2)(– 4) + (1)(– 2)

= 3 + 8 – 2

= 9

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Vector Algebra - Exercise 8.3 [पृष्ठ ७४]

APPEARS IN

सामाचीर कलवी Mathematics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 8 Vector Algebra
Exercise 8.3 | Q 1. (i) | पृष्ठ ७४
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×