4.3 finding missing angles
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Inverse trig ratios, including sin-1, cos-1, and tan-1, are used to solve for missing angle measures. When given a decimal value for sin, cos, or tan, the corresponding inverse trig function is used to find the angle measure to the nearest degree. When given a triangle, the appropriate trig ratio is set up and the inverse function is then used to find the measure of the indicated angle to the nearest degree.
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4.3 finding missing angles
- 2. Inverse trig ratios are used to solve for missing angle measures. They include: sin-1 cos-1 tan-1
- 3. When given a decimal value: Find each angle measure to the nearest degree. sinθ = 0.7193 cosθ = 0.3907 tanθ = 0.6009
- 4. When given a triangle: Set up the appropriate ratio, then use the inverse. Find the measure of the indicated angle to the nearest degree.
- 5. Find the measure of the indicated angle to the nearest degree.
- 6. Find the measure of the indicated angle to the nearest degree. 1. tanθ = 1.6003 2.