Question

Taking a = 30 degree verify cos a 1/root 1 + tan^2 a

Answer 1

SOLUTION

Mate here is your solution dont forget to mark braineliest

$\cos \: a \frac{1}{ \sqrt{1} } + { \tan }^{2} a \\ = \cos30 \times 1 + { \tan }^{2} 30 \\ = \frac{ \sqrt{3} }{2} + \frac{( \frac{1}{2})^{2} }{ { (\frac{ \sqrt{3} }{2}) }^{2} } \\ = \frac{ \sqrt{3} }{2} + \frac{1}{3} \\ = \frac{3 \sqrt{3} + 2 }{6}$