Question

cos Θ = $\frac{ cos \alpha + cos \beta }{1 + cos \alpha cos \beta }$
To Prove that
±tan Θ/2 = $tan \frac{\alpha}{2} tan \frac{\beta }{2}$

Answer 1

Answer:

If cosθ=cosα-cosβ1-cos αcosβ then tan2(θ2)tan2(β2)= check-circle. Text Solution. tanα2. tan2α2. cotα2. cot2α2.

Answer 2

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