Question Details

Detailed explanation and options for the selected question.

If sin(x) = 3/5 and x is in the first quadrant, what is cos(x)?

A. 4/5
B. 3/5
C. 5/3
D. None of these

Explanation:

Using sin^2(x) + cos^2(x) = 1, cos(x) = 4/5. Other options do not satisfy the equation.

Related Topics

How to Solve Word Problems Using Radians

Revision Notes

How to Calculate Percentile Rank

Revision Notes

How to Perform Prime Factorization

Revision Notes

How to Use the Law of Sines in Any Triangle

Revision Notes

How to Use the Pythagorean Theorem

Revision Notes

How to Interpret Logarithmic Scales (pH, Richter, Decibel)

Revision Notes

How to Calculate Arithmetic Mean, Geometric Mean, and Harmonic Mean

Revision Notes

How to Use the Distance Formula (Coordinate Geometry)

Revision Notes

How to Simplify Surds (Irrational Square Roots)

Revision Notes

How to Use Remainder Theorems (Polynomial Division)

Revision Notes