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If sin θ = 1 over 4 and tan θ > 0, what is the value of cos θ? (1 point)

Group of answer choices

negative square root of 15 over 4

square root of 15 over 4

square root of 15

negative square root of 15


Sagot :

Answer:

There are two options: b) [tex]\frac{\sqrt{15}}{4}[/tex], c) [tex]\sqrt{15}[/tex].

Step-by-step explanation:

By Trigonometry, we know that function tangent is equal to the following identity in terms of functions sine and cosine:

[tex]\tan \theta = \frac{\sin \theta}{\cos \theta}[/tex] (1)

If we know that [tex]\tan \theta > 0[/tex] and [tex]\sin \theta = \frac{1}{4}[/tex], then [tex]\cos \theta > 0[/tex]. Hence, we have two possibilities: b) [tex]\frac{\sqrt{15}}{4}[/tex], c) [tex]\sqrt{15}[/tex].