Question

cos ² 45° + sin ² 30 ° , see no spams ❌❌❌​

Answer 1

$\huge\mathtt\colorbox{gold}{\color{purple}{AnSwEr}}$

$= {cos}^{2} {45}^{0} + {sin}^{2} {30}^{0}$

$= {( \frac{1}{ \sqrt{2} } )}^{2} + { (\frac{1}{2} )}^{2}$

$= \frac{1}{2} + \frac{1}{4}$

$= \frac{1 \times 2}{2 \times 2} + \frac{1}{4}$

$= \frac{2}{4} + \frac{1}{4}$

$= \frac{2 + 1}{4}$

${= }\bold\color{purple}{~ \frac{3}{4}}$

Answer 2

Step-by-step explanation:

All you have to do is substitute the values of the trigonometric ratios.

i.e.  cos 45= 1/√2  , sin 30= 1/2

Hope this helps :)