Topic Details (Notes format)

How to Solve Basic Trigonometric Equations (sin, cos, tan)

Subject: Mathematics

Book: Maths Mastery

Trigonometric equations like sin(x)=√3/2 or cos(x)=–1/2 require knowledge of standard angles and quadrants. For sin(x)=√3/2, principal solutions are x=60° or 120° in the range 0°–180° (or x=π/3 or 2π/3 in radians). Additional solutions repeat every 360° or 2π. Similarly, analyze signs for negative values to find the correct quadrants. These steps let you solve for unknown angles in physics wave problems, geometry angles, or cyclical models. Mastering these equations fosters a deeper ability to interpret sinusoidal relationships in real-world phenomena.

Practice Questions

The sum of the reciprocals of two numbers is 1/4. If one number is 12, what is the other?

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If a = 4 and b = 5, what is the value of (a+b)^2?

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What is the greatest common divisor (GCD) of 36 and 48?

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If x = 2 and y = 3, what is the value of (x^2 + y^2)?

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The base of a triangle is 10 cm and its height is 6 cm. What is its area?

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The area of an equilateral triangle with side length 6 cm is:

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What is the sum of the first 50 positive integers?

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If the sum of three consecutive integers is 72, what are the integers?

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What is the value of x if log(x) + log(4) = log(32)?

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If x = 3 and y = 4, what is the value of x^2 + y^2?

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