Topic summaryHeadwind Expand Summary Extracted from the Wikipedia article Headwind and tailwind. Aeronautics calculationsHeadwind=cos[30∘]⋅15knots≈13knots{\displaystyle {\text{Headwind}}=\cos[30^{\circ }]\cdot 15{\mathsf {knots}}\approx 13{\mathsf {knots}}} Wikipedia source
![{\displaystyle {\text{Headwind}}=\cos[30^{\circ }]\cdot 15{\mathsf {knots}}\approx 13{\mathsf {knots}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/ce44c0ba2ff8a553d90a494529c8e513483a4ab0)