


cho tam giác abc và ứng dụng của lượng giác trong vật lý (dao động, sóng)
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- Eligible for » Returns & Refund Policy « within 30 days from the date of delivery
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cho tam giác abc tính p=sina.cos(b+c)
- cho tam giác abc và cos(b+c) = -cosa tính p
- cho tam giác abc và S = 1/2 bc.sina tính p
- cho tam giác abc tính p=sina.cos(b+c) theo định lý sin
- cho tam giác abc tính p=sinc.cos(a+b) nếu tam giác abc cân tại a
- cho tam giác abc tính p=sinc.(-cosc)
- cho tam giác abc và a+b+c=pi tính p=sina.cos(b+c)
- cho tam giác abc có một góc bằng tổng hai góc còn lại tính p=sina.cos(b+c)
- cho tam giác abc tính p=sinc.cos(a+b)
- cho tam giác abc và cota = -1 tính p=sinb.cos(a+c)
- cho tam giác abc và tana.tanc=2 tính p=sinb.cos(a+c)
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