If tan""(alpha)/(2)andtan""(beta)/(2) ar...

If `tan""(alpha)/(2)andtan""(beta)/(2)` are roots of the equation `8x^(2)-26x+15=0` then `cos(alpha+beta)` = …………

`-(627)/(725)`

`(627)/(725)`

`-1`

None of these

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KUMAR PRAKASHAN-TRIGONOMETRIC FUNCTIONS -TEXTBOOK BASED MCQS

If cosalpha=-0.6andpiltalphalt(3pi)/(2) then tan((alpha)/(4)) = ………..
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If tanx=(b)/(a) then acos(2x)+bsin(2x) = ……….
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If cosA=(3)/(4) then 32sin((A)/(2))sin((5A)/(2)) = ……………
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sqrt(2+sqrt(2+2cos4theta))= …………
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If tan^(2)theta=2tan^(2)phi+1 then the value of cos(2theta)+sin^(2)phi...
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If tan""(alpha)/(2)andtan""(beta)/(2) are roots of the equation 8x^(2)...
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If tan(picostheta)=cot(pisintheta) then the value of cos(theta-(pi)/(4...
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The number of solutions of the equation 3sin^(2)x-7sinx+2=0 in [0,5pi]...
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The general solution of the equation sin^(50)x-cos^(50)x=1 is …………
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The solution set of cos2theta=cos^(2)theta-sin^(2)theta is …………
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The number of points of intersection of the graphs 2y=1 and y=sinx,-2p...
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The real solutions of the equation cos^(7)x+sin^(4)x=1 in (-pi,pi) are...
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The solution set of sintheta+costheta=2 is ………
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If 3sintheta=2costheta then the value of sin2theta is …………..
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tan^(6)40^(@)-33tan^(4)40^(@)+27tan^(2)40^(@) = …………
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theta(1),theta(2)in[0,2pi]andtheta(1) and theta(2) satisfy the equatio...
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If (sin(x+y))/(sin(x-y))=(a+b)/(a-b) then (tanx)/(tany) = …………
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Trigonometric point P((101pi)/(3)) lies in………quadrant.
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If cos(alpha+beta)=(4)/(5),sin(alpha-beta)=(5)/(13),0ltalpha,betalt(pi...
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The number of solutions of the equation 16^(sin^(2)x)+16^(cos^(2)x)=10...
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