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Tom [10]
3 years ago
15

Which angle has a tangent and cosine that are both negative? a. 110° b. 180° c. 210° d. 340°

Mathematics
1 answer:
Veronika [31]3 years ago
4 0
<h3>110 degrees has tangent and cosine that are both negative</h3>

<em><u>Solution:</u></em>

<em><u>We have to find the angle that has a tangent and cosine that are both negative</u></em>

<em><u>Option A)</u></em>

110^{\circ}

tan\ 110^{\circ} = -2.7474^{\circ}

cos\ 110^{\circ} = -0.3420^{\circ}

Thus 110 degrees has tangent and cosine that are both negative

<em><u>Option B)</u></em>

180^{\circ}\\tan\ 180^{\circ} = 0\\\\cos\ 180^{\circ} = -1

Thus, 180 degrees does not have tangent and cosine that are both negative

<em><u>Option C)</u></em>

210^{\circ}\\\\tan\ 210^{\circ}=0.5773^{\circ}\\\\\cos\ 210^{\circ} = -0.8660^{\circ}

Thus, 210 degrees does not have tangent and cosine that are both negative

<em><u>Option D)</u></em>

340^{\circ}\\\\tan\ 340^{\circ} = -0.3639\\\\cos\ 340^{\circ} = 0.9396

Thus, 340 degrees does not have tangent and cosine that are both negative

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#7. What are the values/ how do I do it
Tasya [4]

Answer:

x =2

SK = 21

KY = 13

SY = 34

Step-by-step explanation:

we can see from the picture the following:

SK + KY = SY  equation 1

SK=13x-5    equation 2

KY = 2x+9    equation 3

SY = 36-x     equation 4

using equation 2, equation 3 and equation 4 in equation 1 we have:

13x - 5 +  2x + 9 = 36-x  

15x +4 = 36 - x

15x +x = 36-4

16x = 32

x = 32/16

x= 2

using x as 2 we evaluate it in equation 2, equation 3 and equation 4:

SK=13(2)-5 = 21

KY= 2(2) +9 = 13

SY = 36-2 = 34

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