Question

sin80⁰cos20⁰-sin²20⁰​

Answer 1

Given:

$\sin 80\cos20-sin^{2}20$

To Find:

Find the value of $\sin 80\cos20-sin^{2}20$

Solution:

Given, $\sin 80\cos20-sin^{2}20$

$=\sin80\cos20 - \cos80\sin20$

$=\sin(80-20)$

$=\sin60$

$=\frac{\sqrt{3} }{2}$