The value of $\sqrt{cos60°cos30°-sin60°sin30°}$ is :
Answer & explanation
Correct answer: option 3
$\sqrt{cos60°cos30°-sin60°sin30°}$
{ Using formula :- cos ( A + B ) = cosA . cosB - sinA . sinB }
= $\sqrt{cos(60°+30°)}$
= $\sqrt{cos(90°)}$
= 0
The value of $\sqrt{cos60°cos30°-sin60°sin30°}$ is :
Correct answer: option 3
$\sqrt{cos60°cos30°-sin60°sin30°}$
{ Using formula :- cos ( A + B ) = cosA . cosB - sinA . sinB }
= $\sqrt{cos(60°+30°)}$
= $\sqrt{cos(90°)}$
= 0