AI generatedGeometry and measuresKey Stage 3

Finding an angle using inverse tangent

Finding an angle using inverse tangent.

  • Label opposite, adjacent and hypotenuse relative to the angle.
  • Use SOHCAHTOA to select the ratio, then apply the inverse trig function.
  • Use degree mode and round only the final angle.

Example 1

Find the marked angle to 1 decimal place.

Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.

Example 2

Find the marked angle to 1 decimal place.

Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.

Your turn

Question 1

Find the marked angle to 1 decimal place.

Check answer
Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.
Question 2

Find the marked angle to 1 decimal place.

Check answer
Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.
Question 3

Find the marked angle to 1 decimal place.

Check answer
Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.
Question 4

Find the marked angle to 1 decimal place.

Check answer
Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.
Question 5

Find the marked angle to 1 decimal place.

Check answer
Choose the ratio using the two known sides.Apply the inverse function. Make sure the calculator is in degree mode.Round to 1 decimal place.
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