Hard Unit Vector question

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Thread starter 7 months ago
#1
Can anyone help me with this question? I have got the answer for part a it's just question b that I am stuck on.
As for working out so far:
I have acknowledged that that component vector is 1i + 1tan(B)j then I tried to find the magnitude using sqrt (1 squared + tan squared (B)) but I don't know where to go from here.
I have also tried expressing tan as sin/cos but this still doesn't get me anywhere.
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7 months ago
#2
It's not asked you to simplify it, so you could probably just leave it in the form of what it started with divided by the magnitude.

However, if you do wish to simplify, then go with rewriting as sin/cos, and try to get the whole bit inside the root over a common denominator.
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7 months ago
#3
(Original post by 11plusboy)
Can anyone help me with this question? I have got the answer for part a it's just question b that I am stuck on.
As for working out so far:
I have acknowledged that that component vector is 1i + 1tan(B)j then I tried to find the magnitude using sqrt (1 squared + tan squared (B)) but I don't know where to go from here.
I have also tried expressing tan as sin/cos but this still doesn't get me anywhere.
is precisely equal to .

Thus the magnitude is simply .
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