Odpowiedź:
sin α + cos α = √2 = 1/√2 + 1/√2 = √2/2 + √2/2 = 2√2/2 = √2 to
sin 45 + cos 45 = 1/√2 + 1/√2 = √2 to tg 45 = ctg = 45 = 1/(tg 45) = 1
to tg α + 1/tg = 1 + 1 = 2
Szczegółowe wyjaśnienie:
sin α + cos α = √2 = 1/√2 + 1/√2 = √2/2 + √2/2 = 2√2/2 = √2 to
sin 45 + cos 45 = 1/√2 + 1/√2 = √2 to tg 45 = ctg = 45 = 1/(tg 45) = 1
to tg α + 1/tg = 1 + 1 = 2