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Math Question

Geometry \( \gg \) \& R.16 Checkpoint: Right triangle trigonometry \( 45 \mathrm{~J} \) In a right triangle, let \( x \) be the measure of an acute angle, where \( \sin (x)=k \). Select all of the expressions that must also be equal to \( k \). \( \cos (x) \cos \left(45^{\circ}-x\right) \quad \cos \left(60^{\circ}-x\right) \quad \cos \left(90^{\circ}-x\right) \) Submit

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