If 3 cot A = 4, check whether
[tex] \frac{1 - tan { \: }^{2} a}{1 + tan {}^{2}a } [/tex]
=
[tex]cos {}^{2} a \: - sin {}^{2} a[/tex]
or not.
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If 3 cot A = 4, check whether
[tex] \frac{1 - tan { \: }^{2} a}{1 + tan {}^{2}a } [/tex]
=
[tex]cos {}^{2} a \: - sin {}^{2} a[/tex]
or not.
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