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# core 4 Watch

In q4 y=sin2x
therefore y^2=1/2(1-cos4x)
What if y was equal to sin 3x , would it be y^2=1/2(1-cos6x) or 1/2(1-cos9x)
2. it would be 1/2(1-cos6x).
3. (Original post by Ayaz789)
In q4 y=sin2x
therefore y^2=1/2(1-cos4x)
What if y was equal to sin 3x , would it be y^2=1/2(1-cos6x) or 1/2(1-cos9x)
The definition is that

Therefore,

So the solution for is:

4. (Original post by Cryptokyo)
The definition is that

Therefore,

So the solution for is:

Ahh okay thanks!

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