Q.The sum of two angles is $5\pi^{c}$ and their difference is 60°. Find their measures in degree.

Step 1: Convert the sum to degree: $5\pi^{c} = 5\times180° = 900°$.

Step 2: Let the angles be $x$ and $y$ with $x+y=900°$ and $x-y=60°$. …

Convert the radian sum to degree, then solve the resulting sum-and-diffe …

• Treating 5π^c as 5×π = 5° instead of converting properly via 5π×(180/π).
• Sign error when subtracting the difference equation from the sum equation. …