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Recall: Solve 4x-5=11Solve 3x2-2x-1=0What does it mean to solve an equation? (When we write “Solve”, what do we want you to do?)Trig Equation - an equation that contains one or more trig functionse.g. 2cosθ-1=0When solving trig equations, you need to find all measures of θ that make the equation true in the given domain (for example 0≤θ≤2π). The domain is important because it limits the amount of possible solutions (if you looked at all the possible answers in the real line, you could have infinite solutions).To solve, we can use graphs, special triangles and the CAST rule to find all values of θ.*Note – answers should be stated in the same form as the domain (degrees or radians) Example 1 Solve for .a) b) c) d) Example 2Solve sinθ=12 , 0≤θ≤2πExample 3Solve cosθ=-0.8552 , 0≤θ≤360° to the nearest hundredth of a degree.Example 4Solve for .tanθ=-1b) sinθ=122cosθ+1=0d) 5cscθ=4cscθ-23cotθ-1=0Example 5Solve for 0≤θ≤2π. sin2θ=12b) cos2θ=12Example 6Solve for Example 7Solve sec2x-2=0 for -2π≤x≤2π ................
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