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Incredibly annoying M4 problem. (Vectors)

So, that's the problem statement : a.png
and that's the solution:

Attachment not found

Now the annoying bit is, if you try to work out Vw using the Sine rule with the triangle S2BA, you will get the wrong answer. How the hell is this even possible?
Reply 1
@Zacken @TeeEm any ideas?
Original post by oShahpo
So, that's the problem statement : a.png
and that's the solution:

Attachment not found

Now the annoying bit is, if you try to work out Vw using the Sine rule with the triangle S2BA, you will get the wrong answer. How the hell is this even possible?


Perhaps I'm being dense, but I fail to see why triangle ABC is isosceles.
Reply 3
Original post by ghostwalker
Perhaps I'm being dense, but I fail to see why triangle ABC is isosceles.


The other two right triangles are congruent. They have an equal side (Vship) and equal angles.
Original post by oShahpo
The other two right triangles are congruent. They have an equal side (Vship) and equal angles.


Must be extra dense - can you give me the set of vertices for each of the two congruent triangles.

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