45
- 54
54
- 45
Correct answer is D
Where sin θ = opphyp → −35
opp = -3, hyp = 5
using pythagoras formula
hyp2 = adj2 + opp2
adj2 = hyp2 - opp2
adj2 = 52 - 32 → 25 - 9
adj2 = 16
adj = 4
cos θ = adjhyp → 45
In third quadrant: cos θ is negative → - 45
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