Question

ПОМОГИТЕ ПОЖАЛУЙСТА
ХОТЯ БЫ НЕКОТОРЫЕ

Answer 1

$3)1+Ctg^{2}t= \frac{1}{Sin^{2}t}\\\\Ctg^{2}t= \frac{1}{Sin^{2}t}-1\\\\4)Cost=\sqrt{1-Sin^{2}t}= \sqrt{1-a^{2}}\\\\tgt=\frac{Sint}{Cost}= \frac{a}{\sqrt{1-a^{2}} }\\\\Ctgt=\frac{1}{tgt}= \frac{\sqrt{1-a^{2}} } {a}\\\\5)Sint=\sqrt{1-Cos^{2} t}= \sqrt{1-}a^{2}$

$tgt=-\frac{Sint}{Cost}=- \frac{\sqrt{1-a^{2}} } {a} \\\\Ctgt=\frac{1}{tgt}=- \frac{a}{\sqrt{1-a^{2}} }$