Question 87 of 155MediumMCQ
If x=sin−1(sin10) and y=cos−1(cos10), then y−x is equal to: Solutions · 1
Official solution
Since 3π−2π<10<3π+2π: x=sin−1(sin10)=3π−10.
Since 3π<10<4π: y=cos−1(cos10)=4π−10.
\[y-x=(4\pi-10)-(3\pi-10)=\pi.\] Answer the question to unlock