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Asked Apr 18, 2019
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Find the cos(20) if tan9-_ where 180% θ <270
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2 Find the cos(20) if tan9-_ where 180% θ <270

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Expert Answer

Step 1

By use Pythagorean Theorem to determine the side that would be adjacent to the angle.

H2=P2+B.

H represents Hypotenous, P perpendicular, B base.

 

Step 2

Since, the angle is in quadrant III, where only tan and cot are positive, except that all are negative.

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Step 3

On further solving for cos2&t...

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Math

Trigonometry

Trigonometric Ratios

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