Table values for sine, cosine, tangent and cotangent

Practise recalling the exact values of $sin$, $cos$, $tg$, and $ctg$ for $0^\circ$, $30^\circ$, $45^\circ$, $60^\circ$, and $90^\circ$.

{"buttons":[],"questions":[{"text":"$\\sin 30^\\circ$","answer":0,"explanation":"$\\sin 30^\\circ$=$\\frac{1}{2}$","correct_text":"$\\frac{1}{2}$","buttons":["$\\frac{1}{2}$","$\\frac{\\sqrt{2}}{2}$","$\\frac{\\sqrt{3}}{2}$","$\\sqrt{3}$"]},{"text":"$\\sin 45^\\circ$","answer":0,"explanation":"$\\sin 45^\\circ$=$\\frac{\\sqrt{2}}{2}$","correct_text":"$\\frac{\\sqrt{2}}{2}$","buttons":["$\\frac{\\sqrt{2}}{2}$","$\\frac{1}{2}$","$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{3}}{3}$"]},{"text":"$\\sin 60^\\circ$","answer":2,"explanation":"$\\sin 60^\\circ$=$\\frac{\\sqrt{3}}{2}$","correct_text":"$\\frac{\\sqrt{3}}{2}$","buttons":["$\\frac{\\sqrt{2}}{2}$","$\\frac{1}{2}$","$\\frac{\\sqrt{3}}{2}$","$\\sqrt{3}$"]},{"text":"$\\sin 0^\\circ$","answer":3,"explanation":"$\\sin 0^\\circ$=$0$","correct_text":"$0$","buttons":["$\\frac{1}{2}$","$\\frac{\\sqrt{3}}{2}$","$1$","$0$"]},{"text":"$\\sin 90^\\circ$","answer":0,"explanation":"$\\sin 90^\\circ$=$1$","correct_text":"$1$","buttons":["$1$","$0$","$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{2}}{2}$"]},{"text":"$\\cos 0^\\circ$","answer":0,"explanation":"$\\cos 0^\\circ$=$1$","correct_text":"$1$","buttons":["$1$","$0$","$\\frac{\\sqrt{3}}{2}$","$\\frac{1}{2}$"]},{"text":"$\\cos 30^\\circ$","answer":0,"explanation":"$\\cos 30^\\circ$=$\\frac{\\sqrt{3}}{2}$","correct_text":"$\\frac{\\sqrt{3}}{2}$","buttons":["$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{3}}{3}$","$\\frac{\\sqrt{2}}{2}$","$\\frac{1}{2}$"]},{"text":"$\\cos 45^\\circ$","answer":0,"explanation":"$\\cos 45^\\circ$=$\\frac{\\sqrt{2}}{2}$","correct_text":"$\\frac{\\sqrt{2}}{2}$","buttons":["$\\frac{\\sqrt{2}}{2}$","$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{3}}{3}$","$\\frac{1}{2}$"]},{"text":"$\\cos 60^\\circ$","answer":0,"explanation":"$\\cos 60^\\circ$=$\\frac{1}{2}$","correct_text":"$\\frac{1}{2}$","buttons":["$\\frac{1}{2}$","$\\frac{\\sqrt{3}}{2}$","$1$","$\\sqrt{3}$"]},{"text":"$\\cos 90^\\circ$","answer":0,"explanation":"$\\cos 90^\\circ$=$0$","correct_text":"$0$","buttons":["$0$","$1$","$\\frac{1}{2}$","$\\sqrt{3}$"]},{"text":"$\\tg 30^\\circ$","answer":0,"explanation":"$\\tg 30^\\circ$=$\\frac{\\sqrt{3}}{3}$","correct_text":"$\\frac{\\sqrt{3}}{3}$","buttons":["$\\frac{\\sqrt{3}}{3}$","$\\frac{\\sqrt{2}}{2}$","$\\sqrt{3}$","$1$"]},{"text":"$\\tg 45^\\circ$","answer":0,"explanation":"$\\tg 45^\\circ$=$1$","correct_text":"$1$","buttons":["$1$","$\\sqrt{3}$","$\\frac{\\sqrt{3}}{3}$","$0$"]},{"text":"$\\tg 60^\\circ$","answer":0,"explanation":"$\\tg 60^\\circ$=$\\sqrt{3}$","correct_text":"$\\sqrt{3}$","buttons":["$\\sqrt{3}$","$\\frac{\\sqrt{3}}{3}$","$\\frac{1}{2}$","$1$"]},{"text":"$\\tg 0^\\circ$","answer":0,"explanation":"$\\tg 0^\\circ$=$0$","correct_text":"$0$","buttons":["$0$","$\\frac{1}{2}$","$\\sqrt{3}$","$1$"]},{"text":"$\\ctg 30^\\circ$","answer":0,"explanation":"$\\ctg 30^\\circ$=$\\sqrt{3}$","correct_text":"$\\sqrt{3}$","buttons":["$\\sqrt{3}$","$\\frac{\\sqrt{3}}{3}$","$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{2}}{2}$"]},{"text":"$\\ctg 45^\\circ$","answer":0,"explanation":"$\\ctg 45^\\circ$=$1$","correct_text":"$1$","buttons":["$1$","$0$","$\\sqrt{3}$","$\\frac{1}{2}$"]},{"text":"$\\ctg 60^\\circ$","answer":0,"explanation":"$\\ctg 60^\\circ$=$\\frac{\\sqrt{3}}{3}$","correct_text":"$\\frac{\\sqrt{3}}{3}$","buttons":["$\\frac{\\sqrt{3}}{3}$","$\\frac{\\sqrt{3}}{2}$","$\\frac{\\sqrt{2}}{2}$","$\\sqrt{3}$"]},{"text":"$\\ctg 60^\\circ$","answer":0,"explanation":"$\\ctg 60^\\circ$=$0$","correct_text":"$0$","buttons":["$0$","$1$","$\\sqrt{3}$","$\\sqrt{2}$"]}]}