skyne8

Verified answer

2) sin(a)= -√(1-cos²(a))= -√(1 -5/9)=-2/3, tg(a)=sin(a)/cos(a)=2/√5
3)sin(a) = tg(a)/√(tg²(a) +1)=2√2/3
4) cos(a) = -ctg(a)/√(ctg²(a)+1)=-√2/√3

fadarm

Verified answer

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