Oblicz pozostałe wartości funkcji trygonometrycznych wiedząc że alfa nalezy 0' , 90'a)sin alfa=5/13 b)ctg alfa=11/60
a)
sinalfa = 5/13
sin²α+cos²α=1
(5/13)²+cos²α=1
cos²α=169/169-25/169
cos²α=144/169
cosα=12/13
tgα=sinα/cosα=5/12
ctgα=12/5
b) ctgα=11/60
11/60=cosα/sinα
11sinα=60cosα
sinα=60cosα/11
(60cosα/11)² + cos²α=1
3600cos²α/121 +cos²α=1 razy 121
3600cos²α + 121cos²α=121
3721cos²α=121
cosα=18/100
sinα=26/100
tgα=60/11
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a)
sinalfa = 5/13
sin²α+cos²α=1
(5/13)²+cos²α=1
cos²α=169/169-25/169
cos²α=144/169
cosα=12/13
tgα=sinα/cosα=5/12
ctgα=12/5
b) ctgα=11/60
11/60=cosα/sinα
11sinα=60cosα
sinα=60cosα/11
sin²α+cos²α=1
(60cosα/11)² + cos²α=1
3600cos²α/121 +cos²α=1 razy 121
3600cos²α + 121cos²α=121
3721cos²α=121
cosα=18/100
sinα=26/100
tgα=60/11