Mathematics
Mathematics, 16.07.2020 01:01, Neko1kat

1.)The angle θ lies in Quadrant IV. sinθ=−2/3 What is cosθ? a. −2/3
b. 2/3
c. −5/√3
d.5/√3

2.)The angle θ lies in Quadrant I. cosθ=3/5 What is tanθ?

a.4/3
b.−4/5
c. −4/3
d. 4/5

3.)Given sin(−θ)=−1/6 and tanθ=−35/√35. What is the value of cosθ?

a.−35/√210
b.−35/√6
c.35/√210
d.35/√6

4.)cos(−θ)=3/√4, sinθ<0 What is the value of sinθ?

a.13/√4
b. 13/√16
c. −13/√16
d.−13/√4

5.)Marty is proving that the following trigonometric identity is true: tan^2 θ⋅cos^2 θ=1−cos^2 θ

Which step would be the first line of his proof?

a. tan^2 θ⋅cos^2 θ=tan^2 θ
b. tan^2 θ⋅cos^2 θ=sin^2 θ
c. tan^2 θ⋅cos^2 θ=1−sin^2 θ
d. tan^2 θ=1−cos^2 θ⋅cos^2 θ

answer
Answers: 3

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Do you know the correct answer?
1.)The angle θ lies in Quadrant IV. sinθ=−2/3 What is cosθ? a. −2/3
b. 2/3
c. −5/√3

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