1 | ||
cosα= | ||
√1+tg2α |
1 | ||
tgα= | (do potegi drugiej obie strony | |
√1+tg2α |
1 | ||
tg2α= | ||
1+tg2α |
−1−√5 | ||
k1= | <0 odpada | |
2 |
√5−1 | ||
k2= | ||
2 |
√5−1 | ||
tg2α= | ||
2 |
√5−1 | ||
tgα= √ | ||
2 |
√5−1 | ||
α= arctg √ | +kπ | |
2 |
√5−1 | ||
tgα= −√ | ||
2 |
√5−1 | √5−1 | |||
α= arctg(−√ | )=−arctg( | }+kπ | ||
2 | 2 |
π | ||
tgx=cosx zał x≠ | +πk | |
2 |
sinx | |
=cosx | |
cosx |
1−√5 | 1+√5 | |||
t1= | t2= | nie spełnia warunków zadania | ||
2 | 2 |
1−√5 | ||
sinx= | ||
2 |
1−√5 | ||
x= (−1)n arcsin( | )+nπ | |
2 |