X= x.2 x=.4 x=x.10 надо просто их припабивать и получится ответ на 1,2
3)√6*sin63π/4*tq64π/3 =√6*sin(16π-π/4)*tq(22π-π/3) =-√6*s(-sinπ/4)*(-tqπ/3)=
√6*1/√2/ *√3 =3.
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4) ( 1-2sin²54°)/(8tq9°sin²99°) =cos2*54°/((8tq9°* sin²(90° +9°))
=cos108°/(8tq9°*cos²9°)=cos(90°+18°)/(8sin9°*cos9°) = -sin18°/4sin18° == -1/4.
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5) √2*(sin40°cos5°-sin(180°+50°)sin5°)/(sin25°sin35° -sin(90°+25°)cos35°)=
= -√2*sin45°/*cos60° = -√2*1/√2/1(1/2) = -2.
1)x^3+5x^2-x=5 дальше не решается,т.к.разные степени
2)
Q^2 -4q -5/3
-6 +12 -5/3
6 - 5/3
= 4 целых, 1/3
2-3√5×5/6×6=2-3×5/6=2-5/2=2-2.5=-0.5