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Where does cosx = (1/2)^x? 
I know that it is at x=1 but I need 3 other points 

Thanks for the prompt response! 

 Jul 3, 2014

Best Answer 

 #2
avatar+130515 
+5

Here are four points of intersection......of course, there are way more !!! (an infinite number, actually)

x = 0°

x ≈ 1.077 rads   ≈ 61.71°

x ≈ 4.75 rads ≈  272.15°

x ≈ 7.85 rads ≈ 449.77°

Here's a partial graph

 

 Jul 3, 2014
 #1
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0

x =1 doesn't work.

(1/2)^1 = 1/2, and cos(1) does not equal 1/2.

 Jul 3, 2014
 #2
avatar+130515 
+5
Best Answer

Here are four points of intersection......of course, there are way more !!! (an infinite number, actually)

x = 0°

x ≈ 1.077 rads   ≈ 61.71°

x ≈ 4.75 rads ≈  272.15°

x ≈ 7.85 rads ≈ 449.77°

Here's a partial graph

 

CPhill Jul 3, 2014

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