Function Description
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	Name: SINU_1 
	Function: f(x) = a0*cos(x)^2 - a1*cos(x) + a2 
	Parameters: a0 a1 a2

Notes
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C-code for the function
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	b = cos(fabs(x-60.0)*TO_RAD);
	answer = (a0 * b * b) - (a1 * b) + a2;