Trignometric Ra...

If tan A and tan B are the roots of the quadratic equation x²  – ax + b = 0, then the value of sin²  (A + B)

If A = tan 6 ºtan 42 ºand B = cot 66 ºcot 78 º, then

 =

If A + B + C = p &sin   = k sin C/2,then tan A/2  tan B/2  =

In any triangle ABC, which is not right angled S cos A . cosec B . cosec C is equal to

If 3 cos x + 2 cos 3x = cos y, 3 sin x + 2 sin 3x = sin y, then the value of cos 2x is

If cos a + cos b = a, sin a + sin b = b and a - b = 2q, then   =

If A + B + C = p &cos A = cos B . cos C then tan B . tanC has the value equal to

The value of tan + 2 tan  π/8  + 4 is equal to

The value of cos π/19 +cos+cos+...+ cos 17 π/19  is equal to

Consider a right angle triangle PQR, if PQ is 27 and QR is 17 then the value of angle P is

If f(q) = sin⁴  q + cos²  q, then range of f(q) is

If 2 cos x + sin x = 1, then value of 7 cos x + 6 sin x is equal to

If cosec A + cot A = 11/2, then tan A is

If 0 °10  sin x + log₁₀  cos x + log₁₀  tan x is