Teaching Jharkhand (JSSC) TGT (6 to 8) Mock Test 2023-24 Mathematics Trigonometry Trigonometric Identities
अगर \(\cos \theta=\frac{a \cos \phi+b}{a + b \cos\phi}\) , तो \(\tan\frac{\theta}{2}\) किसके बराबर है?
1
\(\sqrt{\left(\frac{a-b}{a+b}\right)}\tan\frac{\phi}{2}\)
2
\(\sqrt{\left(\frac{a+b}{a-b}\right)}\cos\frac{\phi}{2}\)
3
\(\sqrt{\left(\frac{a-b}{a+b}\right)}\sin\frac{\phi}{2}\)
4
इनमें से कोई नही