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If Cos A M Cos B And Cot A B 2 Lambda Tan A B 2 Then Lambda Is

If cos A = m cos B and cot(A + B)/2 = λ. tan(B – A)/2, then λ is equal... View Article

If 0 < β < α < π/2, cos(α + β) = 3/5 and cos(α – β) = 4/5, then... View Article

If sin A + cos A = √2 , then the value of cos2A is 1) √2 2) 1/2 3)... View Article

The value of the expression sin6θ + cos6θ + 3 sin2θ cos2θ is 1) 0 2) 2 3) 3 4)... View Article

cos 1° + cos 2° + cos 3° + … + cos 180° is equal to 1) 1 2) 0... View Article

If sec θ + tan θ = k, then cos θ equals 1) (k2 + 1)/2k 2) 2k/(k2 + 1)... View Article

The value of the expression cos 1° cos 2° ….cos 179° is 1) 0 2) 1 3) 1/√2 4) -1... View Article

[tan A/(1 + sec A)] + [(1 + sec A)/tan A] is equal to 1) 2 sin A 2) 2... View Article

The value of cos (270° + θ) cos (90° – θ) – sin (270° – θ) cos θ is 1)... View Article

The value of cos 480° sin 150° + sin 600° cos 390° is 1) 0 2) 1 3) 1/2 4)... View Article

The expression cos 10π/13 + cos 8π/13 + cos 3π/13 + cos 5π/13 is 1) – 1 2) 0 3)... View Article

sec2θ = 4xy/(x + y)2 is true if and only if 1) x + y ≠ 0 2) x =... View Article

The general values of θ satisfying the equation 2 sin2θ – 3 sin θ – 2 = 0 is 1)... View Article

3(sin x – cos x)4 + 6 (sin x + cos x)2 + 4 (sin6x + cos6x) = 1) 11... View Article

If χ sin3θ + y cos3θ = sin θ cos θ and χ sin θ = y cos θ, χ2... View Article

If sec θ = m and tan θ = n, then 1/m[(m + n) + 1/(m + n)] is equal... View Article

Let n be a positive integer such that sin π/2n + cos π/2n = √n/2. Then 1) 6 ≤ n... View Article

1) √2 2) 3√2 3) 2√2 4) 2 – √2 Answer: (3) 2√2 Solution: tan 67 1/2° + cot 67... View Article

Let 0 < x < π/4 then (sec 2x – tan 2x) equals (1) tan(x – π/4) (2) tan(π/4 –... View Article

If tan θ = 1/√7, then (cosec2θ – sec2θ)/ (cosec2θ + sec2θ) is equal to (1) 1/2 (2) 3/4 (3)... View Article