Find the slope of the tangent to the curve x=4 cos3⁡3θ and y=5 sin3⁡⁡3θ at θ=π/4.

• A. –\(\frac{3}{4}\)
• B. –\(\frac{1}{4}\)
• C. \(\frac{5}{4}\)
• D. –\(\frac{5}{4}\)