Thread: Trig Identities and Equations

Verifiy the following identites letting @=theta.

1. cos@= sec@ - sin@tan@

2. sin@ cos@
----- + ----- = 1
csc@ sec@

1) Factorise the right side by $\displaystyle \frac1{\cos\alpha}$

2) Rember that $\displaystyle \csc\alpha=\frac1{\sin\alpha}$ and $\displaystyle \sec\alpha=\frac1{\cos\alpha}$