Trigonometric RatiosHard
Question
If tan 
and tan 
are the roots of the equation 8x2 − 26x + 15 = 0 then cos (α + β) is equal to-
and tan are the roots of the equation 8x2 − 26x + 15 = 0 then cos (α + β) is equal to-Options
A.−
B.
C.−
D.− 1
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