Apply the trigonometric identity: cos(θ)nsec(θ)m\cos\left(\theta \right)^n\sec\left(\theta \right)^mcos(θ)nsec(θ)m=cos(θ)(n−m)=\cos\left(\theta \right)^{\left(n-m\right)}=cos(θ)(n−m), where m=2m=2m=2 and n=4n=4n=4
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3k<273k<273k<27
−6⋅18-6\cdot18−6⋅18
6.4n−10=4.4n+66.4n-10=4.4n+66.4n−10=4.4n+6
9.515720\frac{9.5157}{20}209.5157
3a2−10a+33a^2-10a+33a2−10a+3
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