江苏省泰州市高中数学第1章三角函数1.2.3(二)诱导公式(五~六)同步训练(无答案)苏教版必修4.doc

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江苏省泰州市高中数学第1章三角函数1.2.3(二)诱导公式(五~六)同步训练(无答案)苏教版必修4.doc_第1页
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1、1诱导公式(五六)一、填空题1已知 sin ,那么 cos .(52 ) 152已知 cos ,且 是第四象限角,则 cos(3 ) .(32 ) 353sin( 7)cos .( 32)4已知 sin ,则 cos .( 4) 13 (4 )5已知 f(sin x)cos 3 x,则 f(cos 10)的值为 6若 sin( )cos m,则 cos 2sin(2 )的值为 (2 ) (32 )7若 cos ,且 是第四象限角,则 cos .15 ( 2)8sin 21sin 22sin 288sin 289 .9已知 tan(3 )2,则 .sin( 3 ) cos( ) sin(2 )

2、2cos(2 ) sin( ) cos( )10在 ABC中, sin 3sin( A),且 cos cos( B),则 C .3 (2 A) 3二、解答题211已知角 的终边经过点 P(4,3),求 的值cos(2 )sin( )cos(112 )sin(92 )12已知 sin cos ,且 ,求 sin 与 cos 的值(2 ) ( 52 ) 60169 4 213已知 sin( ) .计算:(1)cos ; (2)sin ; (3)13 ( 32) (2 )tan(5 )三、探究与拓展14已知 sin( 3)2cos( 4),则 .sin( ) 5cos(2 )2sin(32 ) sin( )15已知 是第四象限角,且f( ) .sin( )cos(2 )cos(2 )sin( )cos(2 )(1)若 cos ,求 f( )的值; (2)若 1 860,求 f( )的值( 32) 15

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