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HELP ME!!

Select the correct answer from each drop-down menu.
Complete the statement.
If and θ is in quadrant III, and .

HELP ME!! Select the correct answer from each drop-down menu. Complete the statement-example-1
User Ofer Magen
by
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1 Answer

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The correct answer from each drop-down menu is:

If cost 8 = 8 and tan20 = 17, then cos28 = -8/17.

To solve this problem, we can use the double angle formula for cosine:

cos2θ = 2cos²θ - 1

We know that cos20 = 17, so we can substitute this value into the formula:

cos2(20°) = 2(cos20°)² - 1

cos2(20°) = 2(17²)² - 1

cos2(20°) = -8/17

Therefore, the correct answer is cos28 = -8/17.

User Hoper
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