Przeksztalcenia

[mbanan17]

1.Oblicz

a)\(\displaystyle{ -sin^{2}}\)\(\displaystyle{ 10^{0}}\)-\(\displaystyle{ sin^{2}}\)\(\displaystyle{ 80^{0}}\)=

b) (\(\displaystyle{ tg 42 ^{0}}\)\(\displaystyle{ cos ^{2}}\)\(\displaystyle{ 21 ^{0}}\) +\(\displaystyle{ tg 42^{0}}\)\(\displaystyle{ cos ^{2}}\)\(\displaystyle{ 49 ^{0}}\))*\(\displaystyle{ tg 48 ^{0}}\)

[piasek101]

a) z tego , że \(\displaystyle{ sin80^0=sin(90^0-10^0)=...}\)