請指教1下小弟@@
麻煩哂~
Q1) 2sinΘcosΘ+(sinΘ-cos)² ≡ 1
Q2) (x-4)÷2 +1≧x÷3
Q3)(x+1)÷4 - (2x+1)÷7＜1
Q4) It is given that the inclination(傾角) of a straight line L is 45° , and L passes through two points P(-2,3) and Q(4,k).Find:
Q4a ) the slope of L;
Q4b ) the value of k.
Q5) It is given that the vertices(頂點) of quadrilateral(四邊形) ABCD are A(-3,0),B(2,-5),C(9,-2) and D(5,2).Determine(確定) if ABCD is a parallelogram.
麻煩各位數學達人幫助小弟解決疑難@@
萬分感謝@@
更新1:
有d符號出唔到- - Q2) (x-4)÷2 +1(大過或等於[向 > 面] )x÷3
更新2:
s0rry-.-第1題漏打左個Θ-.- Q1) 2sinΘcosΘ+(sinΘ-cosΘ)² ≡ 1
