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A DAS GUPTA-Circular Functions, Identities -Exercise
- Prove that sin pi/14* sin 3pi/14 * sin 5pi/14 = 1/8.
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- Show that :sin pi/7 *sin 2pi/7* sin3pi/7 = sqrt7/8
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- If u = sec theta + tan theta then tan theta in terms of u is.
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- If sin x + cos x = m(ne pm 1) and sec x + cosec x = n then n in terms ...
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- If alpha gt 0 such that tan(x + alpha) = tan x for all x in R then the...
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- If theta = 5pi/9 the sign of the expression cos theta + sin theta is.
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- If 5cos 2t + 12sin 2t = lambda sin(2t -tan^(-1)mu) where lambda, mu ar...
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- If cos A = 3/4 then the value of 32sin( A/2)* sin (5A/2) is.
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- If sin(theta + 3alpha) = 3sin(alpha - theta) then tan theta in terms o...
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- If 0 lt beta lt alpha lt gamma and cos(alpha + beta) = 4/5, sin(alpha...
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- If 4nalpha = pi then the numerical value tan alpha* tan 2alpha *tan 3...
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- Let sin^(3)x* sin 3x = sum(m=0)^(n) cm cos mx be an identity in x wher...
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- If (cos (alpha1- alpha2))/(cos (alpha1+ alpha2)) = (cos (alpha3+ alph...
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- If sin x + sin y = a, cos x - cos y = b then the value of tan ((y-x)/2...
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- The numerical value of sin^(2)5^circ + sin^(2)10^circ + sin^(2)15^circ...
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- The numerical value of cos 2pi/7 + cos 4pi/7 + cos 6pi/7 is=........
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- The numerical value of sin pi/18 * sin 5pi/18* sin 7pi/18 is.............
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- The numerical value of tan 20^circ* tan 40^circ* tan 80^circ =.
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- The numerical value of tan 20^circ* tan 40^circ* tan 80^circ =.
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- The numerical value of cos pi/15* cos frac {2pi}{15}* cos frac {4pi}{...
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