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Q 9( i )

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Asked by pukai7229 26th June 2018, 9:38 PM
Answered by Expert
Answer:
Sin(3x) / Cos(3x) = Cos(x) / Sin(x) 
Sin(3x)Sin(x) = Cos(x) Cos(3x) 
Sin(3x)Sin(x) - Cos(x)Cos(3x) = 0 Apply the Trig Identity for Cos 
Cos(3x + x) = 0 
Cos(4x) = 0 
4x = Cos^-1(0) 
4x = pi 
x = pi /4 = 22.5 degrees
Answered by Expert 29th June 2018, 6:02 PM
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