Bộ 30 đề thi vào 10 môn Toán có lời giải chi tiết (Đề 25)

$A.\sin {44}^0=\cot {46}^0$

$B.\sin {44}^0=\tan {46}^0$

$C.\cos {44}^0=\cot {46}^0$

$D.\sin {44}^0=\cos {46}^0$

$A.GiaođiểmcủacácđườngphângiáctrongcủatamgiácABClàtâmđườngtrònbàngtiếptamgiácABC$

$B.CómộtvàchỉmộtđườngtrònbàngtiếpmộttamgiácABC$

$C.CóbađườngtrònnộitiếpmộttamgiácABC$

$D.GiaođiểmcủaphângiáctronggócAvàphângiácngoàigócBlàtâmđườngtrònbàngtiếptronggócAcủatamgiácABC$

$A.-1$

$B.1$

$C.-5$

$D.5$

$A.x\ne 2;x\ne \frac{3}{2}$

$B.x\ne 0,x\ne \frac{3}{2}$

$C.x\ne 0,x\ne \frac{2}{3}$

$D.x\ne 0,x\ne -\frac{3}{2}$

$A.S_{tp}=2\pi rh+2\pi r$

$B.S_{tp}=2\pi rh+2\pi r^2$

$C.S_{tp}=\pi r^{2}h$

$D.S_{tp}=\pi rh+\pi r^2$

$A.10$

$B.13$

$C.12$

$D.11$

$A.\left(9;0\right)$

$B.\left(9;-9\right)$

$C.\left(-9;0\right)$

$D.\left(-3;3\right)$

$A.180°$

$B.120°$

$C.60°$

$D.30°$

$A.3$

$B.4$

$C.1$

$D.2$

$A.mp\left(ACC\text{'}A\text{'}\right)//mp\left(BDD\text{'}B\text{'}\right)$

$B.mp\left(ABCD\right)//mp\left(A\text{'}B\text{'}C\text{'}D\text{'}\right)$

$C.mp\left(ABB\text{'}A\text{'}\right)//mp\left(DCC\text{'}D\text{'}\right)$

$D.mp\left(ADD\text{'}A\text{'}\right)//mp\left(BCC\text{'}B\text{'}\right)$

$A.Đồthịcủahàmsốđãchonằmphíatrêntrụchoành$

$B.Hàmsốnghịchbiếnkhix>0vàđồngbiếnkhix<0$

$C.Giátrịnhỏnhấtcủahàmsốbằng0khix=0$

$D.Đồthịhàmsốnhậntrụctunglàmtrụcđốixứng$

$A.-12$

$B.12$

$C.-4$

$D.-20$

$A.y=\frac{1}{3}x$

$B.y=2x+\frac{1}{3}$

$C.y=\frac{1}{x}-1$

$D.y=2-x$

$A.A{B}^2=HB.BC$

$B.A{H}^2=HB.HC$

$C.A{H}^2=AB.AC$

$D.A{C}^2=HC.BC$

$A.Một$

$B.Vôsố$

$C.Hai$

$D.Ba$

$A.2x+3y=5$

$B.3\sqrt{x}-y=1$

$C.2x^2+5y=3$

$D.2x+\frac{1}{y}=3$

$A.3$

$B.\frac{2}{3}$

$C.\frac{3}{2}$

$D.2$

$A.a>2$

$B.a=2$

$C.a<2$

$D.a\ne 2$

$A.x\le 2020$

$B.x\ge 2020$

$C.x\ne 2020$

$D.x>-2020$

$A.\pm \left(1-\sqrt{5}\right)$

$B.\sqrt{5}-1$

$C.1-\sqrt{5}$

$D.{\left(1-\sqrt{5}\right)}^2$

$A.m=-1$

$B.m=-5$

$C.m=5$

$D.m=1$

$A.AB=8cm$

$B.AB=4cm$

$C.AB=12cm$

$D.AB=16cm$

$A.m>0$

$B.m<\frac{2}{3}$

$C.m>\frac{2}{3}$

$D.m\ne \frac{2}{3}$

$A.\angle A={120}^0,\angle C={60}^0$

$B.\angle A={130}^0,\angle C={50}^0$

$C.\angle A={105}^0,\angle C={75}^0$

$D.\angle A={140}^0,\angle C={40}^0$

$A.AH=6\sqrt{3}cm$

$B.AH=12\sqrt{3}cm$

$C.AH=12cm$

$D.AH=6cm$

$A.BC=2\sqrt{10}cm$

$B.BC=8cm$

$C.BC=10\sqrt{2}cm$

$D.BC=10cm$

$A.-1$

$B.0$

$C.1$

$D.2$

$A.6a-12$

$B.a^2-7a+30$

$C.8a+30$

$D.8a-26$

$A.\frac{490}{9}$

$B.\frac{9}{10}$

$C.\frac{-490}{9}$

$D.-\frac{9}{10}$

$A.m=-5$

$B.m=7$

$C.m=-7$

$D.m=5$

$A.3$

$B.2$

$C.4$

$D.1$

$A.S=\left(1;3\right)$

$B.S=\left(2;3\right)$

$C.S=\left(1;2\right)$

$D.S=\left(1;2;3\right)$

$A.a=-2$

$B.a=-3$

$C.a=2$

$D.a=3$

$A.\angle COD={50}^0$

$B.\angle COD=100°$

$C.\angle COD=25°$

$D.\angle COD=130°$

$A.4$

$B.-3$

$C.-4$

$D.3$

$A.10$

$B.5$

$C.25$

$D.5\sqrt{2}$

$A.T=9$

$B.T=14$

$C.T=10$

$D.T=5$

$A.48giờ$

$B.12giờ$

$C.36giờ$

$D.24giờ$

$A.5,94cm$

$B.5,74cm$

$C.5,84cm$

$D.6,04cm$

$A.1$

$B.2$

$C.3$

$D.0$

$A.2\sqrt{Rr}$

$B.3\sqrt{Rr}$

$C.2\sqrt{2Rr}$

$D.\sqrt{2Rr}$

$A.0,415(đơnvịđộdài)$

$B.0,414(đơnvịđộdài)$

$C.0,828(đơnvịđộdài)$

$D.0,829(đơnvịđộdài)$

$A.75$

$B.78$

$C.72$

$D.66$

$A.S=200c{m}^2$

$B.S=192c{m}^2$

$C.S=202c{m}^2$

$D.S=190c{m}^2$

$A.6$

$B.7$

$C.8$

$D.5$

$A.5$

$B.6$

$C.0$

$D.1$

$A.294c{m}^2$

$B.292c{m}^2$

$C.290c{m}^2$

$D.296c{m}^2$

$A.T=288$

$B.T=294$

$C.T=290$

$D.T=292$

$A.8$

$B.7$

$C.9$

$D.6$

$A.51$

$B.3$

$C.\sqrt{3}$

$D.\sqrt{51}$