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If A 130 And X Equal To Sin A Plus Cos A Then

1) x > 0 2) x < 0 3) x = 0 4) x ≤ 0 Answer: (1) x >... View Article

1) 2 2) 4 3) 8 4) 16 Answer: (3) 8 Solution: x sin 45° cos260° = (tan260° cosec 30°)/(sec... View Article

1) 1/2 2) -1/2 3) 1/4 4) 1 Answer: (3) 1/4 Solution: we know that sin 18° = (√5 –... View Article

1) x = 0 2) y = 0 3) x = y 4) x = nπ – π/4 + y,... View Article

1) 1/2 2) 1 3) √2 4) 1/√2 Answer: (4) 1/√2 Solution: cos 105° + sin 105° = cos 105°... View Article

1) 0 2) 2 sin 15° 3) cos 15° + sin 15° 4) sin 15° – cos 15° Answer: (1)... View Article

1) 1/8 2) 1/4 3) (1 + √2)/2√2 4) (√2 – 1)/(√2 + 1) Answer: (1) 1/8 Solution: Given, α... View Article

1) 0 2) 1 3) -1 4) 2 Answer: (3) -1 Solution: cos 1° + cos 2° + cos 3°... View Article

1) 1 2) 0 3) -1 4) None of these Answer: (2) 0 Solution: sin 10° + sin 20° +... View Article

1) 2 2) 3 3) 1 4) 0 Answer: (1) 2 Solution: (cot 54°/tan 36°) + (tan 20°/cot 70°) =... View Article

1) 0 2) -1 3) 1 4) None of these Answer: (3) 1 Solution: Given, tan2α tan2β + tan2β tan2γ... View Article

1) 2 2) -4 3) ±4 4) 4 Answer: (4) 4 Solution: Given, tan θ – cot θ = a….(i)... View Article

1) -3 2) -2 3) 1 4) None of these Answer: (3) 1 Solution: Given, sin2θ = (x2 + y2... View Article

1) 3 2) 2 3) 1 4) 0 Answer: (4) 0 Solution: Given, sin θ1 + sin θ2 + sin... View Article

1) cot α cot β cot γ 2) tan α tan β tan γ 3) cot α + cot β... View Article

In 1883, the Kjeldahl technique was invented by a brewer named Johann Kjeldahl. The procedure is based on the theory... View Article

Differentiation is a method of discovering a parameter that, with respect to another variable, produces the rate of change of... View Article

Corrosion inhibitors are chemical compounds which, when applied to the atmosphere in which a metal is corroded in small quantities,... View Article

On the tiny charge of an isolated oil droplet, Millikan was able to calculate both the sum of electric force... View Article

A weak acid is an acid that in an aqueous solution or water dissociates partly into its ions. The conjugate... View Article