2sin1320 * ctg(-780) - 3cos (-900)

Question

2sin1320 * ctg(-780) - 3cos (-900)

Answer 1

Думаю так..




0

30


/6

45


/4

60


/3

90


/2

120


2/3

135


3/4

150


5/6

180




210


7/6

225


5/4

240


4/3

270


3/2

300


5/3

315


7/4

330


11/6

360


2

sin

0







1







0







-1







0

cos

1







0







-1







0







1

tg

0



1



—



–1



0



1



—



–1



0