cos135°=?sin135°=?cos75°=?sin75°=?
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cos135°=?sin135°=?cos75°=?sin75°=?
sin135=?cos135=?如题
sin135°=?
cos135°等于多少
cot90°= cot120°= cot135°= cot150°= tan90 = tan120 = tan135 = tan150 =cos90 = cos120 = cos135 = cos150 =sin90 = sin120 = sin135 = sin150 =万能置换公式 tan2a= sin2a= cos2a= 二倍角公式 sina=?cosa=?= = tana=?半角公式 sina=?cosa=?tana=?
sin135°是多少?
sin135°等于多少
计算:sin(3π /4 ) +cos (2π /3) - sin 150° + cos135°=?
2sin67°30′cos67°30′=sin135°=√2/2
求值,sin150= cos135= tan120=
(1)下列等式中正确的一组是A.cos45°<cos90°<cos135° B.cos45°>cos90°>cos135°C.cos45°<cos135°<cos90° D.cos45°>cos135°>cos90°(2)cos(-19/4π)+cos5/6π(3)若f(x)=ax+bsinx=1(a,b为常数)满足f(5)=7,
cos135 cosA= - 1 ,A = 打错了...cos135别管它
COS135°怎么算?还有COS3分之π
cos(π-α)=?.cos135=-cos45?
cosx cos 【180-x】cos135=-cos45` 怎证明?
sin315度- cos135度+2sin570度=
sin315度- cos135度+2sin70度=
sin135°+cos225°+tan(-120°)的值是