Math, asked by srishti7354, 11 months ago

How do you express cos(27π8) as a trig function of an angle in Quadrant I?

Answers

Answered by Anonymous

1

Answer:

−cos(3π8)

Explanation:

On the unit circle,

cos(27π8)=cos(11π8+2π)=cos(11π8)=

=cos(3π8+π)=−cos(3π8)

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