How to find the cosine of an angle


Problem:

The sine of some angle is 0.45.

Question- What is the cosine of that same angle? (There are two possibilities.) Use Matlab and the identity sin^2(theta) +cos^2(theta) = 1 to determine the cosine of that same angle, or at least for one of the possibilities. Screenshot the solution from matlab

 

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Computer Engineering: How to find the cosine of an angle
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