Question
Asked Jun 13, 2019
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Use the given information to find the exact value of each of the following.
a. sin 20
b. cos 20
c. tan 20
9
sin 0
0 lies in quadrant II
41
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Use the given information to find the exact value of each of the following. a. sin 20 b. cos 20 c. tan 20 9 sin 0 0 lies in quadrant II 41

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Step 1

Given,

 

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0 lies in quadrant III 41 sin e -

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Step 2
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[1-x,50 40 sin2 cos .cos0 1-sin2 0 1600 9 81 V1681 41 1681 41 But e lies in quadrant III and cos0 is negative in quadrant III 40 cos0 - 41

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Step 3
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a. sin 20 2sin 0 cos 720 9 40 41 41 1681 40 b. cos 20 2cos 0-1= 2| -1 41 1600 2 ( 1681 3200 -1= 1519 -1= 1681 1681 720 71681 cos 20 1519 sin 20 720 c. tan 20 1519 /1681

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Trigonometric Ratios

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