Question

Determine a value of x for each of the following. Give answers in simplest exact form.

cos (11pi/31) = sinx

Answer 1

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Answer:

x = 9π/62

Explanation:

We can make use of the fact that ...

sin(x) = cos(π/2 -x)

Then ...

π/2 -x = 11π/31

π(1/2 -11/31) = x = 9π/62