0 52529 52537 52543 52547 52553 52555 52559 52565 52567 52573 52579 52583 52585 52589 52595 52597 52603 52607 52609 52613 52615 52619 52621 52623 52624 52625 52627 52628 52629 52631 52633 52637 52639 52643 52645 52649 52655 52657 52663 52667 52669 52673 52679 52685 52687 52693 52697 52699 52705 52709 52715 52723 266669
)-cos585°·tan(
).
);(2)cos(
);(3)tan(-405°).
(
＜α＜π),则tanα=_____________.
),则α属于( )
) B.(
,
) C.(
,
) D.(
,
)
,
＜α＜π,则tanα=_________________.
,其中α为入射角,β为折射角)
=1+tan2α+sin2α.
C.45 D.