दिखाइए की रेखाएं जिनके दिक् - कोसाइन `2/7, 3/7, 6/7` तथा ` 3/7, (-6)/7, 2/7` है, परस्पर लम्ब है ।

2 1/7+3 6/7+5 1/6=

2 /5 + 3/7 - 6/5 -13/7 =____

Subtract : 7 3/7-6 2/5

Subtract : 7 3/7-6 2/5

2(1)/(7) + 3(6)/(7) + 5(1)/(6) = ?

Mode of .2, 7, 5, 3, 7, 1, 6, 9, 7, 3, 6, 3 is

The mean and median of 7, 5, 5, 2, 7, 6, 5, 3, 7, 6

.Add the following 3/7 and (-6)/7

.Add the following 3/7 and (-6)/7

Which of the following is an orthogonal matrix ? ( ⎡ ⎢ ⎣ 6 / 7 2 / 7 − 3 / 7 2 / 7 3 / 7 6 / 7 3 / 7 − 6 / 7 2 / 7 ⎤ ⎥ ⎦ (b) ⎡ ⎢ ⎣ 6 / 7 2 / 7 3 / 7 2 / 7 − 3 / 7 6 / 7 3 / 7 6 / 7 − 2 / 7 ⎤ ⎥ ⎦ (c) ⎡ ⎢ ⎣ − 6 / 7 − 2 / 7 − 3 / 7 2 / 7 3 / 7 6 / 7 − 3 / 7 6 / 7 2 / 7 ⎤ ⎥ ⎦ (d) ⎡ ⎢ ⎣ 6 / 7 − 2 / 7 3 / 7 2 / 7 2 / 7 − 3 / 7 − 6 / 7 2 / 7 3 / 7 ⎤ ⎥ ⎦