Ap Eapcet
Trigonometric Ratios And Identities
AP EAPCET 2025 - 26th May Evening Shift
MCQ+1 / -02025
If $\cos ^3 80^{\circ}+\cos ^3 40^{\circ}-\cos ^3 20^{\circ}=k$, then $\frac{4 k}{3}=$
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