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`        If 0.5icap+o.8jcap+ckcap is a unit vector.Find the value of C.`
7 years ago

```							DEAR NIMISH

If

0.5icap+o.8jcap+ckcap is a unit vector then its magnitude should be 1. So the value of C is 0.33

```
7 years ago
```							111/2
check it it is 100% correct.
```
7 years ago
```							Hello Nimish
modulus of 0.5i+0.8j+C k= √(0.5)2 + (0.8)2 + C2
= √0.25+0.64+C2
= √0.89 + C2
But its a unit vector. therefore it''s magnitude should be equal to 1.
√0.89+C2 = 1
squaring both sides,
0.89+C2= 1
C2= 1-0.89 = 0.11
C = 0.33

All the best!
```
7 years ago
```							Hey the answer was right but tell the way to solve it.
```
7 years ago
```							0.25+.64+c^2=1
then c=(11)^1\2
```
6 years ago
```							The formula is _/a^2+b^2+c^2 = Magnitude Put value in the above formula _/(0.5)^2+(0.8)^2+c^2=1By calculating we get -/0.11
```
2 years ago
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