学年

教科

質問の種類

英語 高校生

教えてほしいです

2 次の英文を読み, 空所に入れるのに最も適切なものを,それぞれ下の①~④のうちから一つずつ選びなさい。 (6) When growing tomatoes, we know we should pick them when they're bright red. With carrots, however, ( 6 ) because they grow underground. ①we should pick them when they turn orange (2) it's hard to know when they're ready (3) we should grow them more carefully than tomatoes (4) it's easy to know when they're bright red (7) Although it is quick, easy and convenient to be able to look up information on the internet, it can sometimes be difficult ( 7 ) because there is so much information. to find what you are looking for (2) to improve the convenience of the internet (3) to get more than what you need that people often experie (4) to have good computer literacy (8) Would you be happier if you were richer? Many people believe that they would be. But research conducted over many years suggests that ( 8 ). People in the United States, for example, are, on average, richer than New Zealanders, but they are not happier. poorer people tend to worry about their financial problems 2 pleasure in life usually comes from great wealth (3) the best way to be happy is learning how to save money greater wealth doesn't generally imply greater happiness (9) Many European rivers were once heavily polluted by manufacturing industries. As a result, wild animals dependent on clean water disappeared. However, as stricter environmental standards took effect, rivers such as the Thames of London have become much cleaner. Consequently, ( 9 ). water quality has continued to decline wild animals avoid drinking from the Thames (3) wild animals are making a comeback in many rivers (4) wild animals no longer depend on clean water

回答募集中 回答数: 0
数学 高校生

次の(2)問題の青い線のtanθはなぜ符号がそれぞれ逆になってるのでしょうか?解説お願い致します🙇‍♂️

68 三角比の相互関係 0°≦0≦180°とするとき, 次の問いに答えよ. (1) cos 0: 9= 1/32 のとき, sino, tane の値を求めよ. (2) tan=√3-2 のとき, sind, costの値を求めよ。 (3) sin0=2 のとき, coso, tan0 の値を求めよ. 66のより、 次の4つの式が成りたちます. × r IC IC 精講 I. sin0 y r y =tan 0 coso ■ sin" 0+ cos"0= x² + y² = 22 +(モー =(%)+(税) sin20+ cos^0=1 1 II. sin"0+ cos20=1 の両辺を cos20 でわると sin0 tan 0: coso A つけて また, tan0 sin_22 -x3=2√2 Cos 3 注 1+tan20 1 cos³ を用いても, tanの値は求まりますが の符号 (この場合は+) を考える必要があるので,この解答の方 いでしょう。 1 1 1 4+2√3 (2) cos20 1+tan201+(√3 -2) 4(2-√3) 8 ここで, tan0 <0 だから, 0は鈍角. これが大切 . cos0 <0 . cos 0 /4+2/3 2/2 3 +1 6+√2 2√2 4 また, sin0=tan 0·cos0 =(2-√3 *6+√2 4 √6-√2 4 注 これも(1)と同様で, sin'0+cos20=1 を用いると符号の心配を なければなりません。 ります sinO\2 +1=- cos o 1 COS20 ∴. 1+tan20= 1 cos20 (3) cos^0=1-sin20=1- 1-(3)²= 2 16 25 V. sin 0+ cos² 0-1 の両辺を sin0 でわると COS 30=土 1 1 1+ sin 0 3 5 また, tan0= tan20 sin20 cos 0 5 x(土)=量(号同順) この4つの公式は sind costan をつなぐ大切な関係式で3つの三角

解決済み 回答数: 1