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<?php $dist = sin(deg2rad(45.9007)) * sin(deg2rad(45.9007)) + cos(deg2rad(45.9007)) * cos(deg2rad(45.9007)); var_dump( $dist, acos($dist) );
Output for git.master, git.master_jit, rfc.property-hooks
float(1.0000000000000002) float(NAN)

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