Add tan to interval
Add tan to interval

fpvandoorn/lean,soonhokong/lean-osx,leodemoura/lean,avigad/lean,javra/lean,htzh/lean,soonhokong/lean,leanprover/lean,codyroux/lean0.1,fpvandoorn/lean,leodemoura/lean,fpvandoorn/lean,dselsam/lean,leanprover/lean,avigad/lean,levnach/lean,leanprover-community/lean,fpvandoorn/lean,johoelzl/lean,soonhokong/lean-osx,soonhokong/lean-windows,htzh/lean,sp3ctum/lean,rlewis1988/lean,leodemoura/lean,levnach/lean,sp3ctum/lean,levnach/lean,rlewis1988/lean,soonhokong/lean-windows,Kha/lean,sp3ctum/lean,johoelzl/lean,eigengrau/lean,htzh/lean,UlrikBuchholtz/lean,dselsam/lean,eigengrau/lean,fpvandoorn/lean2,soonhokong/lean-windows,c-cube/lean,digama0/lean,fpvandoorn/lean2,c-cube/lean,rlewis1988/lean,leanprover-community/lean,UlrikBuchholtz/lean,leanprover-community/lean,soonhokong/travis_test,UlrikBuchholtz/lean,soonhokong/lean-windows,soonhokong/lean-osx,javra/lean,rlewis1988/lean,leanprover/lean,digama0/lean,fgdorais/lean,dselsam/lean,codyroux/lean0.1,javra/lean,avigad/lean,fgdorais/lean,fgdorais/lean,fpvandoorn/lean,fpvandoorn/lean2,rlewis1988/lean,htzh/lean,levnach/lean,soonhokong/lean-windows,digama0/lean,leanprover/lean,UlrikBuchholtz/lean,Kha/lean,eigengrau/lean,Kha/lean,fpvandoorn/lean2,levnach/lean,avigad/lean,fgdorais/lean,digama0/lean,avigad/lean,soonhokong/lean-osx,eigengrau/lean,leodemoura/lean,digama0/lean,leanprover/lean,c-cube/lean,Kha/lean,leanprover-community/lean,codyroux/lean0.1,soonhokong/lean-osx,dselsam/lean,dselsam/lean,soonhokong/travis_test,fgdorais/lean,Kha/lean,c-cube/lean,soonhokong/travis_test,johoelzl/lean,soonhokong/lean,fgdorais/lean,johoelzl/lean,soonhokong/lean,digama0/lean,htzh/lean,javra/lean,leanprover/lean,soonhokong/lean,sp3ctum/lean,dselsam/lean,leanprover-community/lean,soonhokong/travis_test,eigengrau/lean,codyroux/lean0.1,UlrikBuchholtz/lean,leanprover-community/lean,avigad/lean,johoelzl/lean,c-cube/lean,johoelzl/lean,rlewis1988/lean,javra/lean,sp3ctum/lean,soonhokong/lean,leodemoura/lean,fpvandoorn/lean,Kha/lean,fpvandoorn/lean2,leodemoura/lean