यदि \( A + B + C = 180^\circ \) भए प्रमाणित गर्नुहोस्: If… – SEE Class 10 Optional Maths 2081 Solved

SEE Class 10 Optional Maths · 2081 · Solved Question with Answer

यदि \( A + B + C = 180^\circ \) भए प्रमाणित गर्नुहोस्:
If \( A + B + C = 180^\circ \) then prove that:
\( \cos A + \cos B + \cos C = 1 + 4\sin\dfrac{A}{2} \cdot \sin\dfrac{B}{2} \cdot \sin\dfrac{C}{2} \)

Solution

यदि \( A + B + C = 180^\circ \) भए प्रमाणित गर्नुहोस्: If \( A + B + C = 180^\circ \) then prove that: \( \cos A + \cos B + \cos C = 1 +…

Please login to view the answer.