Solve the equation cos x° = sin 40°, where 0 < x < 90.

cos (90-x) = sin (x), 

and sin (90-x) = cos(x)

Let's just try and pick the top one, the equation will become

cos (90-40) = sin (40)

Cos (50) = sin (40)

Hope this helps

the correct answer is anaphylaxis.

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