tan^2 30應該點計

tan^2 30 is (sin^2 30)/(cos^2 30)
= (1/2) (1/2) / [(root3/ 2) ^2]
=1/3

tan² 30°
= (tan 30°)²
= (1/開方3)²
=1/3

其實我阿sir話應該
tan^2 30唔應該係(tan 30)^2
佢話這些是規矩，而且那些數學家,工程師,科學家等也是用tan^2 30來表示.....

tan2次方30度
= tan² 30º
= (tan 30º)²
= .......

係tan左先2次方

tan^2 30 = (tan30)^2