SOLUTION: Draw a unit circle with an angle theta in the second quadrant,and use it to prove that tan^2 theta+1=sec^2 theta.
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-> SOLUTION: Draw a unit circle with an angle theta in the second quadrant,and use it to prove that tan^2 theta+1=sec^2 theta.
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Question 985832: Draw a unit circle with an angle theta in the second quadrant,and use it to prove that tan^2 theta+1=sec^2 theta. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Draw a unit circle with an angle theta in the second quadrant,and use it to prove that tan^2 theta+1=sec^2 theta.
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Note:: It really doesn't matter what Quadrant theta is in.
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tan = y/x / sec = r/x
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Show that::
(y/x)^2 + 1 = (r/x)^2
(y^2 + x^2/x^2 = (x^2+y^2)/x^2
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Cheers,
Stan H.
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