yesterday we have learn in class is about special angel and the trigonometric fucntions 1 to determine the exact value of trigonometric ratios for any multiples of 0°, 30°, 45°, 60° and 90° : as well as 0 , π/6 , π/4 , π/3 and π/2.
Six Trigonometric Functions
Sinθ = O/H Cscθ = H/O
Cosθ = A/H Secθ = H/A
Tanθ = O/A Cotθ = A/O
Special Angles - most angel on the unit circle are base on referenceangles of either 30°, 45° or 60°.
To find out solve the equation first. Select possible quadrant using CAST rule. Than check the interval given. By using the soh cah toa determine the reference angle by substituting the value of Sin θ = Opposite/Hypotenuse in a triangle in selected quadrant for this example. In last by using 3 simple steps we can find the related angle.
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