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 Reduce Algebraic Fractions with Polynomials

Revision Notes

How to Convert Improper Fractions to Mixed Numbers

Revision Notes

How to Convert Units (Metric System)

Revision Notes

How to Factor the Difference of Squares

Revision Notes

How to Apply Euler’s Theorem and Fermat’s Little Theorem

Revision Notes

How to Use the Pythagorean Theorem

Revision Notes

How to Perform a One-Way ANOVA

Revision Notes

How to Interpret Box-and-Whisker Plots

Revision Notes

How to Solve Exponential Inequalities

Revision Notes

How to Solve Linear Equations (Two Variables)

Revision Notes