If α and β are two positive acute angles satisfying α-β=15° and sinα=cos2β find the value of α+β
Janvi Vijay , 8 Years ago
Grade 11
Trigonometry> If α and β are two positive acute angles ...
1 AnswersVikas TU
Given that sinα=cos2β
Sin α =sin(pi/2-2β)
However, α and β are two positive intense points
So α=pi/2-2 β
α +2 β =pi/21
Additionally given that α-β=15°2
Fathoming 1 and 2
3β=5pi/12
Β=5pi/36=25 deg
α-β=15
so α=40 deg
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