Inspired by Mridul Jain

Geometry Level 4

xn=asinnθ+bcosnθ \large x_n=a \sin n\theta+b\cos n\theta

Find x7x_7 if the numbers a,a, bb and θ\theta satisfy the following equations: x1=15,x_1=15, x2=3,x_2=3, and x3=12.x_3=-12.


Inspiration.

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