5272道题目5525 条题源记录 · 相同内容已合并
三角函数・单位圆与弧度进阶
Point F lies on a unit circle in the xy-plane and has coordinates (1, 0). Point G is the center of the circle and has coordinates (0, 0), Point H also lies on the circle and has coordinates (-1, y), where y is a constant. Which of the following could be the positive measure of angle FGH, in radians?
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三角函数・单位圆与弧度进阶
In right triangle ABC, angles A and B are acute, side AC has a length of 23.2, and\( Tan\ B=\frac{1}{7} \) . What is the length of side BC, rounded to the nearest tenth?
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三角函数・单位圆与弧度进阶
Point F lies on a unit circle in the xy-plane and has coordinates \( \left(1,0\right) \) . Point G is the center of the circle and has coordinates \( (0,0). \) Point H also lies on the circle and has coordinates\( \left(-1,\ y\right) \) , where \( y \) is a constant. Which of the following could be the positive measure of angle FGH, in radians?
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三角函数・单位圆与弧度进阶
If cos A = 0.69, what is the value of sin C?
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三角函数・单位圆与弧度进阶
The measure of angle B is \( \frac{7π}{4} \) radians. What is the value of cos(B)?
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三角函数・单位圆与弧度进阶
In right triangle \( RST \), the sum of the measures of angle \( R \) and angle \( S \) is 90 degrees. The value of \( sin(R) \) is\( \frac{2\sqrt{10}}{7} \). What is the value of\( cos(S) \)?
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三角函数・单位圆与弧度进阶
The measure of angle \( C \) is \( \frac{3π}{4} \) radians. What is the value of \( cos(C) \)?
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三角函数・单位圆与弧度挑战
In right triangle ABC, angles A and B are acute, side AC has a length of 28.2, and \( tanB=\frac{1}{3} \). What is the length of side BC rounded to the nearest tenth?
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三角函数・单位圆与弧度进阶
The difference between the measure of angle A and the measure of angle B is \( −\frac{5}{12}π \) radians. Which expression shows the difference between the measure of angle A and the measure of angle B, in degrees?
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三角函数・单位圆与弧度进阶
The measure of angle \( B \) is \( \frac{3π}{4} \) radians. What is the value of \( sin(B) \) ?
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三角函数・单位圆与弧度进阶
In triangle \( ABC \), \( BC=36\sqrt{3} \). What is the value of \( cosA \) ?
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三角函数・单位圆与弧度进阶
According to a US law, ramps for use by the general public must form an angle with level ground such that \( tanθ≤\frac{1}{12} \) . If the ramp in the figure conforms to this law and has a height of 22.7 inches. What is the least possible value of x, in inches?
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