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/sci/ - Science & Math

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7085451 No.7085451[DELETED]  [Reply] [Original]

I don't get how to get from that to the answer. I think I did everything else right, but I don't know how to get back to x.

>> No.7085465

x = 4 sin theta.
We know that sin 2 theta is 2 sin theta cos theta.
Re-arrange using this and the Pythagorean trigonometric identity, that is cos squared x + sin squared x equals 1.

>> No.7085467
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7085467

>>7085451

>> No.7085472

>>7085467
You went RHS to LHS insetad of LHS to RHS.
Come on.
If it was an if and only if statement, you would have to prove both ways, but in this case the tutor seemed to want you to prove LHS to RHS.

>> No.7085549

>>7085465

Thanks.

>> No.7085563

>>7085472
No, I'm not the kid, this is the work of my student.

>> No.7085567

>>7085467
>>7085472
>>7085563
samefag
MODS fucking ban this faggot already

>> No.7085577

>>7085567
That's not me lol

>> No.7086081
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7086081

Not OP, but if I kept it as the one that the arrow is pointing at then would it be the same?