Establish or refute the propsed identity tan^2(a)-cos^2(a)= sin^2(a).
Follow Math Help Forum on Facebook and Google+
Hello, Originally Posted by christenc05 Establish or refute the propsed identity tan^2(a)-cos^2(a)= sin^2(a). $\displaystyle \Longleftrightarrow \tan^2(a)=\sin^2(a)+\cos^2(a)$ $\displaystyle \Longleftrightarrow \tan^2(a)=1$ One can see that this is not true for any value of a
View Tag Cloud