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Selling price of the article = a + (4a/5) = Rs. (9a/5) So, (9a/5) = (2.75 × a)/400 × 0.80 Or, 1.8a = (2.75a /400) × 0.80 Or, 2.25a = 2.75a / 400 Or, 0.5a = 400 Or, a = 800 So, marked price of the article = 2.75 × 800 = Rs. 2200
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
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If tan θ = (2/√5), then determine the value of cos2 θ
If √3cosec 2x = 2, then the value of x:
If x = (sin 30 ° + cos 30 ° )/sec 60 ° , then find the value of 4x.
If sin3A = cos(5A-30°), then what is the value of A? Given that 3A is an acute angle.
If sin x + cos x = √2 sin x, then the value of sin x - cos x is:
Simplify the given equation: