Question

The angle 0 in the second quadrant. if tan 0 = -0.75, find sin0 and cos0

Answer 1

sinθ = 3/5 and cosθ = -4/5

Explanation:

If tanθ = -3/4, then opposite/adjacent => 3/-4. Using Pythagoras' theorem we get:

hyp² = opp²+adj² => 3²+4² = 25

so, hyp = √25 => 5

Now, sinθ = opp/hyp => 3/5 and cosθ = adj/hyp => -4/5

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