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Elanso [62]
2 years ago
12

If you get this right i’ll give u the brainliest answer

Mathematics
1 answer:
Ivanshal [37]2 years ago
8 0

b equals 0 I looked it up have a good day

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Let theta be an angle in quadrant 2 such that cos theta =-3/4. Find the exact values of csc theta and cot theta.
Anna35 [415]

Step-by-step explanation:

Since cos(\theta) = -\frac{3}{4} we can get some information from this. First of all cos(\theta) is defined as \frac{adjacent}{hypotenuse}. So the adjacent side is 3 and the hypotenuse is 4. Using this we can find the opposite side to find sin(\theta) to calculate csc and cot of theta. So using the Pythagorean Theorem we can solve for the missing side. Also I forget to mention we have to calculate the sign of the adjacent side and the hypotenuse. Since you're given that the angle is in quadrant 2, that means the x-value is going to be negative, and the y-value is going to be negative. And the x really represents the adjacent side and the y represents the opposite. So the adjacent side is what's negative. and the opposite is positive

Pythagorean Theorem:

a^2+b^2=c^2

(-3)^2 + b^2 = 4^2

9 + b^2 = 16

b^2 = 7

b = \sqrt{7}

So now we can calculate sin(\theta).

sin(\theta) = \frac{\sqrt{7}}{4}

Now to calculate the exact value of csc you simply take the inverse. This gives you csc(\theta)=\frac{4}{\sqrt{7}}. Multiplying both sides by sqrt(7) to rational the denominator gives you \frac{4\sqrt7}{7}.

Now to calculate cot(theta) you  find the inverse of tan. Tan is defined as tan(\theta) = \frac{sin(\theta)}{cos(\theta)}. So all you do is take the inverse which is cot(\theta) = \frac{cos(\theta)}{sin(\theta)}.

Plug values in

cot(\theta) = \frac{-\frac{3}{4}}{\frac{4\sqrt{7}}{7}}

Keep, change, flip

-\frac{3}{4} * \frac{7}{4\sqrt7}

Multiply:

-\frac{21}{16\sqrt7}

Multiply both sides by sqrt(7)

-\frac{21\sqrt7}{112}

This is the value of cot(theta)

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138.98 i hope this helped!!
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Answer:

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Step-by-step explanation:

i could nit find a answer for tge problem and the answer i got was not on the pic sooo

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