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Aldobe
@Aldobe
July 2022
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Очень и очень надо...
8.19, 8.22
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sshum111
8.19 а)
sina*(-sina)*cosa/cosa*(-tga)*(-ctga)=-sin²a
b)
(-sina)*(-sina)*cosa*(-tga)/(-cosa)*(-cosa)*cosa*(-tga)=tg²a
8.22
a) sina=4/5 tg=4/3 ctg=3/4
b) cos=-√3/2 tg=-1/√3 ctg=-√3
c) sin=-0,8 tg=4/3 ctg=3/4
d) cos=0,6 tg=-4/3 ctg=-3/4
e) sin=12/13 cos=5/13 ctg=5/12
f) cos=-√2/2 sin=√2/2 tg=-1
g) sin=-5/13
h) cos=-√2/2
1 votes
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Answers & Comments
sina*(-sina)*cosa/cosa*(-tga)*(-ctga)=-sin²a
b)
(-sina)*(-sina)*cosa*(-tga)/(-cosa)*(-cosa)*cosa*(-tga)=tg²a
8.22
a) sina=4/5 tg=4/3 ctg=3/4
b) cos=-√3/2 tg=-1/√3 ctg=-√3
c) sin=-0,8 tg=4/3 ctg=3/4
d) cos=0,6 tg=-4/3 ctg=-3/4
e) sin=12/13 cos=5/13 ctg=5/12
f) cos=-√2/2 sin=√2/2 tg=-1
g) sin=-5/13
h) cos=-√2/2