Question

b) cos²45⁰+ sin² 30⁰​

Answer 1

Answer:

$\frac{3}{4}$

Step-by-step explanation:

cos²45⁰+ sin² 30⁰​

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

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

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

= $\frac{6}{8}$

= $\frac{3}{4}$

Answer 2

Answer:

cos²45°+sin²30° = (1/√2)² + (1/2)²

= 1/2+1/4

= 3/4