∴CD=BD，
∴∠B=∠BCD，
∵AE⊥CD，
∴∠CAH+∠ACH=90，
∠ ACB = 90 degrees
∴∠BCD+∠ACH=90
∴∠B=∠BCD=∠CAH, that is ∠B=∠CAH,
AH = 2CH，
∴ AC=5CH comes from Pythagorean theorem,
∴CH:AC= 1:5，
∴sinb=55；
(2)∫sinB = 55，
∴AC:AB= 1:5，
∴AC=2.
∠∠CAH =∠B，
∴sin∠CAH=sinB=55= 15，
Let ce = x (x > 0) and AE= praised and trampled. What is your evaluation of this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Law Professional Edition. Other similar problems 2014-11-12. In the known Rt△ABC, ∠ ACB = 90, CD is the midline on the hypotenuse AB, and point A is AE. AE intersects with CD and CB at points H and E respectively, and ah = 2ch912017-10-02 (2012? Shanghai) as shown in the figure, in Rt△ABC, ∠b >∠ACB = 90°, D is the midpoint of the AB side, BE⊥CD, and the vertical foot is E, and it is known that AC= 15, COSA = 35.42018-02-28 (28 ∠ B > ∠ A Interpretation 4720111-26 As shown in the figure, it is known that in Rt△ABC, ∠ ACB = 90, and the hypotenuse of CD is the center line on AB. Verification: CD =1/2ab.12012-05-12 as shown in the figure, in Rt△abC, ∠ ACB = 90, CD is the center line of AB side, and△ △ADC is folded along the straight line of AC side. Make point D fall on point E, 502012-1-20 (2012 Shanghai), such as Rt△ABC, ∠ ACB = 90, D is the midpoint of side AB, BE⊥CD, and stand upright. & gt recommended for you: F.context('cmsRight', [{'URL':'/d01373f082025aaf511aa256e9edab64034f1a07? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； Why is the cost of cancer treatment getting higher and higher? The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 17 19387338；