state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Trigonometry Trigonometric Functions
If sin α + sin β = a and cos α - cos β = b, then the value of \(\tan \left( {\frac{{\alpha - \beta }}{2}} \right)\) will be
1
a + b
2
a - b
3
\(- \frac{a}{b}\)
4
\( - \frac{b}{a}\)
5
Question Not Attempted