Question

Trygonometria

oblicz sin , cos, tg i ctg (alfa)

Answer 1

4²+b²=7²

b²=49-16

b²=33

b=√33

 

sinα=  √33 / 7

cosα= ⁴/₇

tgα= √33 / 4

ctgα=  4 / √33 = 4√33 /33  

Answer 2

b=4    c=7  

a²+b²=c²

a²=c²-b²= 7² -4²=49-16=33

a=√33

 

sinα= a  = √33

         c       7

cosα= b  =  4

          c      7

tgα = a  = √33

         b       4

 

ctgα= b   =  4    =  4√33

          a      √33       33