28 lines
707 B
TeX
28 lines
707 B
TeX
\magnification=1200
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\raggedright
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\parindent=0pt
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SPECIAL ANGLES
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\medskip
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When you start the test, write this down:
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$$\matrix{
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{\sqrt0\over2}&{\sqrt1\over2}&{\sqrt2\over2}&{\sqrt3\over2}&{\sqrt4\over2}\cr
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\cr
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0^\circ&30^\circ&45^\circ&60^\circ&90^\circ\cr
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}$$
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The pattern should be easy to remember:
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The square roots of 0 to 4, and then the special angles.
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Visualize the graph of the sine function starting at zero.
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\medskip
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The graph of the cosine function starts at 1 so reverse the
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pattern for cosine.
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$$\matrix{
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{\sqrt0\over2}&{\sqrt1\over2}&{\sqrt2\over2}&{\sqrt3\over2}&{\sqrt4\over2}\cr
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\cr
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0^\circ&30^\circ&45^\circ&60^\circ&90^\circ\cr
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\cr
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90^\circ&60^\circ&45^\circ&30^\circ&0^\circ\cr
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}$$
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\end
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