1.

1—tan® 30° 1SE B’ = T 3.1 Etan” g0 2

Answer»

cos(60°) = 1/2

1 - tan²(30°)-------------------1 + tan²(30°)

1 - (1/√3)²-----------------------1 + ( 1√3)²

1 - 1/3---------------1 + 1/3

2/3-------------- 4/3

= 1/2



Discussion

No Comment Found