關於try it!的問題

請問圈起來的部分急需要謝謝🥹！我不理解1.為什麼是30度，不是從a-b嗎應該是60度吧？ 2.伸縮倍數怎麼判斷的 3.面積怎麼算的😌

9 例題11 合成變換饮 60 配合課本內文 P.235 如右圖,在坐標平面上,△OAB為30°-60°-90°的三角形,已知A 點坐標為(5,2),試求B點坐標。 B 60 30° A(5, 2) -x O 【解 04 臺甲管 - Notes. 合成矩陣的各種基本線性變先逆時針轉換,先作用的矩陣要先放在 x x |的左邊跟| 相乘。再伸縮這倍類題 L 10330° MC √3 Sin38 √3 -3 -sin30 (0330 #][] ][1 25

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數學高中 3天以前

想問這兩題不用二項式定理可以怎麼算？

4X+15 4x+18 20 5410 TY FIL LIX+3X 5414X 【常考題】 57+10 例題15 44418 X=-12 -4% 27 50 3x+12y (x+3)! y=-11 17/412 (-W 設二階方陣4=| 並求出a、b的值。試將 1+24 表示成ad+b(a、b為實數)的形式解 @_ (A) + (32" (3A)+( 解題步骤: @ 4A120A +3A+ZA A 2 19 2 1. AA (ZA)=(A) +Cε2°(EA) (&(A)+(&(EN) + I + (ci+c+c ~14 (2²-1) (M) - I'm G (A)-(A) (A) (34) (A)-(A), •CA-(A)(A)(A)(A)(A) @ZA-AZ-A =22) (1+2 A)* 1 # 190

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英文高中 7天以前

問第11題

Bolz (C)to seeing (D)of seeing My mom was very pleased to see the dishes by my father. (A)do (B)to do (C)done (D)doing Sam never goes swimming without warming up his body first. (A)without (B)to (C) of (D)as 双否定

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英文高中 7天以前

求解15題

our arrangements. (A)on (B) for (C)about (D)to person doesn't make any difference repeated failure, Joyce never gave up and kept going on. (A)Despite (B)Without (C)Though (D)By The diner finished his lunch, i 1 ! a big tip on his table in appreciation of the good service 16 provided by the waitress. (A) left (B) to leave (C) and leave (D) leaving

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英文高中 7天以前

求解

ming up his body first. (A)without 双否定 (B)to (C)of (D)as The naughty kids disturbed a nest of bees do it again. (A) of (B) by (C)for (D)with no reason and got stung. They promised to never You can come join us on our trip to the mountains. One person doesn't make any difference our arrangements. (A)on (B)for (C)about (D)to

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物理高中 10天以前