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Given cos x = 4/5, 0 < x < 90 Find sin 2x, cos 2x, tan 2x?

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  • Given cos x = 4/5, 0 < x < 90 Find sin 2x, cos 2x, tan 2x?


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... Use the given information to find cos(x/2), sin(x/2), and ... right triangle in quadrant III where sin>0, cos0, tan>0... cos(x)=-4/5 (given ...
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Positive: 20 %
SOLUTION: Find sin2x, cos2x, and tan2x if cos=4/5 and x terminates in quad iv. I found that opp=3, hyp= 5, and adj=4. I am having trouble trying to figure ...
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Positive: 17 %

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