1) Find a value for in the interval 90 degrees ≤ θ ≤ 270degrees that satisfies the equation 2 sinθ + 1=0
2) If m < B= 60 degrees, a=6, and c=10, what is the area of triangleABC to the nearest hundredths?
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2016-01-10 5:33 am
回答 (2)
2016-01-10 6:36 am
2 sinθ + 1=0, 90 degrees ≤ θ ≤ 270degrees,
sinθ = -1/2, FOR, 90 degrees ≤ θ ≤ 270degrees,
Or,
θ = arcsin(-1/2), for 90 degrees ≤ θ ≤ 270degrees,
Hence,
θ = 180+30 = 210 dwgree, for 90 degrees ≤ θ ≤ 270degrees, >=====< ANSWER
sinθ = -1/2, FOR, 90 degrees ≤ θ ≤ 270degrees,
Or,
θ = arcsin(-1/2), for 90 degrees ≤ θ ≤ 270degrees,
Hence,
θ = 180+30 = 210 dwgree, for 90 degrees ≤ θ ≤ 270degrees, >=====< ANSWER
2016-01-10 5:55 am
#1 ; 210° ; #2 ; 15 ...{ 10 / 2 x 6 cos 60° }
收錄日期: 2021-05-01 15:31:41
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