(1)当k属于z时,求sin(k兀-a)•cos(k兀+a)/{sin[(k+1)兀+a]•cos[(k+1)兀+a]}的值.(2)设tan(x+5兀/8)=a,求sin(x+13pai/8)+3cos(x-19pai/8)/[sin(27pai/8-x)-cos(x+21pai/8)]的值.pai就是兀.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 17:56:37
![(1)当k属于z时,求sin(k兀-a)•cos(k兀+a)/{sin[(k+1)兀+a]•cos[(k+1)兀+a]}的值.(2)设tan(x+5兀/8)=a,求sin(x+13pai/8)+3cos(x-19pai/8)/[sin(27pai/8-x)-cos(x+21pai/8)]的值.pai就是兀.](/uploads/image/z/3911550-6-0.jpg?t=%281%29%E5%BD%93k%E5%B1%9E%E4%BA%8Ez%E6%97%B6%2C%E6%B1%82sin%EF%BC%88k%E5%85%80-a%EF%BC%89%26%238226%3Bcos%EF%BC%88k%E5%85%80%2Ba%EF%BC%89%2F%7Bsin%5B%28k%2B1%29%E5%85%80%2Ba%5D%26%238226%3Bcos%5B%EF%BC%88k%2B1%EF%BC%89%E5%85%80%2Ba%5D%7D%E7%9A%84%E5%80%BC.%282%29%E8%AE%BEtan%EF%BC%88x%2B5%E5%85%80%2F8%29%3Da%2C%E6%B1%82sin%EF%BC%88x%2B13pai%2F8%29%2B3cos%28x-19pai%2F8%29%2F%5Bsin%2827pai%2F8-x%29-cos%28x%2B21pai%2F8%29%5D%E7%9A%84%E5%80%BC.pai%E5%B0%B1%E6%98%AF%E5%85%80.)
xR=O0+#sQD?e0LU"BTJ8۩K;KZap[~ueO'pQQ7n*1kM;8J*']
2_(G}?^$ky<=[XdM1n(:R}H|`棂8;Al.SrPN@$iލ[m@3q)Yn"2uq?V1Yf!e<7OͰвjE?GzN*ԀOX5<|A6BeK ;г