Question
Asked Oct 21, 2019
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given: cos theta=1/8 and 3pi/2<theta<2pi. Find and simplify the exact value of:

-cos2theta

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Expert Answer

Step 1

Compute the sin theta v...

sin 0 t1-cos20
63
=t,
64
V63
8
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sin 0 t1-cos20 63 =t, 64 V63 8

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Tagged in

Math

Trigonometry

Trigonometric Ratios