Question

The value of cos^-1(-1/2)+cos^-1(1/2)

Answer 1

$\huge{\boxed{\boxed{\sf{\red{A}{N}{\blue{S}{\red{W}{\green{E}{R}}}}}}}}$

$\red{\sf{Now, {cos}^{-1}(-1/2)= \frac{2\pi}{3} }}$

$\green{\sf{So, {cos}^{-1}(-1/2)+{cos}^{-1}(1/2)=\frac{2π}{3} + \frac{2π}{3}}}$

$\therefore \: {\huge{\red{\boxed{\green{\boxed{\blue{\sf{\frac{4π}{3}}}}}}}}}$

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