Asked by Zi
If sinθ=4/5 and cosθ<0,find the exact value of cosθ and tanθ
help me!
help me!
Answers
Answered by
Steve
cosθ < 0 and sinθ > 0 means θ is in QII
The triangle is obviously a 3-4-5 triangle, so
cosθ = -3/5
tanθ = -4/3
The triangle is obviously a 3-4-5 triangle, so
cosθ = -3/5
tanθ = -4/3
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