Mathematics
Senior High
19、20題 求解🙏
25
C
25
13 13
C = 5
C=-
19.設是銳角,若m.cos-n-sin=3,且m.sin8+h.cos=1,則m²+n²=
20.函數f(x)=cos2x+sinx+1,x為實數,若f(x)之最大值為M,最小值為m,
則M+m=.
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