$\begin{array}{l}\sin \left( {x + \dfrac{\pi }{3}} \right) = - \dfrac{{\sqrt 3 }}{2}\\ \Leftrightarrow \sin \left( {x + \dfrac{\pi }{3}} \right) = \sin \left( { - \dfrac{\pi }{3}} \right)\\ \Leftrightarrow \left[ \begin{array}{l}x + \dfrac{\pi }{3} = - \dfrac{\pi }{3} + k2\pi \\x + \dfrac{\pi }{3} = \dfrac{{4\pi }}{3} + k2\pi \end{array} \right.\\ \Leftrightarrow \left[ \begin{array}{l}x = - \dfrac{{2\pi }}{3} + k2\pi \\x = \pi + k2\pi \end{array} \right.\left( {k \in Z} \right)\end{array}$
$sin(x+\dfrac{\pi}{3})=-\dfrac{\sqrt[]{3}}{2}=sin(-\dfrac{\pi}{3})$
$⇔$\(\left[ \begin{array}{l}x+\dfrac{\pi}{3}=-\dfrac{\pi}{3}+k2\pi\\x+\dfrac{\pi}{3}=\pi+\dfrac{\pi}{3}+k2\pi\end{array} \right.\)
$⇔$\(\left[ \begin{array}{l}x=-\dfrac{2\pi}{3}+k2\pi\\x=\pi+k2\pi\end{array} \right.\) $(k∈Z)$
GIÚP MK VỚI Ạ MK CẦN GẤP vote 5 sao và cảm ơn ạ
Mai mình phải nộp á Cứu mình điiii
Ai trả lời hay mà nhanh nhất . Cho 5 sao 🙄
Vẽ Bad girl và good girl (không phải mọt sách) Là kẻ thù của nhau. Vẽ sao mà nhìn đọng lòng luôn đó nhoa:3
What awful day! A. a B. an C. the D. Ø His farther vegetables and cattle. A. raises/grows B. grows/grows C. grows/raises D.raises/raises She loves in the garden. A. work B. works C. working D. to working Her mother is a . She works in a big hospital. A. architect B. engineer C. librarian D. doctor This apartment is more than that one. A. cheaper B. bigger C. larger D. expensive It’s not easy a comfortable apartment here. A. find B. finding C. to find D. finds interesting film! A. What B. What a C. What an D. What the Why is Hoa ? A. worry B. worrying C. worried D. to worry What’s Lan’s house like? - . A. It’s large and nice. B. There are ten rooms. C. It’s on Nguyen Trai Street. D. It has a garden. is she talking to? A. What B. Where C. Where D. Who What delicious meal! A. a B. an C. some D. ø It is an awful restaurant. It is the restaurant! A. badder B. worse C. baddest D. worst A works on a farm. A. doctor B. teacher C. farmer D. journalist what colorful pictures! A. a B. an C. the D. ø What expensive dress! A. a B. an C. the D. ø There a sink, a tub, and a shower in the bathroom. A. is B. are C. have D. has take care of sick people. A. Doctors B. Teachers C. Farmers D. Journalist This hotel is the in town. A. new B. newer C. newest D. newwest People usually cook food in the . A. bathroom B. kitchen C. living room D. bedroom Hoa’s sister is looking a job. She wants to work a hotel. A. for/at B. in/on C. for/in D. at/in Everst is mountain in the world. A. the most highest B. the higher C. the highest D. the high Would you like to go out tonight? - . A. Yes, I’d love to B. Yes, I would C. Yes, I do D. Yes, I like there any milk in the fridge? A. Is B. Are C. Do D. Does Would you like orange juice? A. an B. a C. any D. some He writes for Thanh Nien newspaper. He’s a . A. doctor B. teacher C. farmer D. journalist A man who fights fire is a . A. fighter B. cook C. firenam D. firework She always shopping with her friends at weekend. A. go B. going C. goes D. to go there table in the bedroom? A. Are/any B. Is/a C. Is/many D. Are/some This is biggest apartment in the building. A. a B. an C. the D. than Which car is , the black one or the red one? A. expensive B. the expensivest C. the most expensive D. more expensive
calli : mình hiền Kó tâm NL : Nửa kia đang ở đâu lèo??????
giải giúp em ạ tuần sau em trả lời cô ạ
Word form ạ Giải thích giúp em tại sao dùng từ đó luôn ạ
Căn cứ vào đâu để xác định dc ptbd chính trong mỗi đoạn trích
Em nhờ mọi người giải giúp em bài này với ạh. Em cảm ơn mọi người ạh
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