If tan 2 and tan 2 are the roots of the equation 8x 2 – 26x + 15 = 0 then cos (α + β) is…
Mathematics · JEE Main · NTA Exams — Trigonometry
If tan \(\frac{\alpha}{2}\)and tan \(\frac{\beta}{2}\) are the roots of the equation
8x2 – 26x + 15 = 0 then cos (α + β) is equal to
8x2 – 26x + 15 = 0 then cos (α + β) is equal to
- \(-\frac{627}{725}\)
- \(\frac{627}{725}\)
- –1
- none of these
Answer
(A) - 627 725
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