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Let the cost price of the book be Rs. '100y' ATQ: (100y X 1.11) - (100y X 0.78) = 165 Or, 111y - 78y = 165 Or, 33y = 165 So, 'y' = (165/33) = 5 So, cost price of the book = 5 X 100 = Rs. 500 Therefore, required selling price at a profit of 25%: = 100y X 1.25 = 100 X 5 X 1.25 = Rs. 625
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: