三角関数

さんかくかんすう

noun

•

trigonometric function(mathematics)

三	three
角	angle, corner, square, horn, antlers
関	connection, barrier, gateway, involve, concerning
数	number, strength, fate, law, figures
函	box (archaic)

おお

にんげん

さんかくかんすう

まな

むいみ

おも

I think that for many people learning the trigonometric functions is meaningless

、

せんせい

？

こくばん

か

、

しすうかんすう

さんかくかんすう

Er, Sir? What's written on the blackboard isn't an exponential function but a trigonometric one ..