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Which of the following in an orthogonal ...

Which of the following in 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 3//7-3//7-6//7 2//7 3//7]`

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Which of the following in an orthogonal matrix a [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 3//7-3//7-6//7 2//7 3//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 ⎤ ⎥ ⎦

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 ⎤ ⎥ ⎦

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

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

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

Add the following fractions: 1/6+4/6 (ii) 2/7+3/7+4/7

Add the following fractions: 1/6+4/6 (ii) 2/7+3/7+4/7

Subtract : 7 3/7-6 2/5

Subtract : 7 3/7-6 2/5