Explore BrainMass

Explore BrainMass

    Find sin 2x Without Using a Calculator

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Given sin x=-1/8 and tan x < 0, find sin 2x (without using a calculator).

    © BrainMass Inc. brainmass.com March 4, 2021, 6:23 pm ad1c9bdddf

    Solution Preview

    Let's look at the allowed values for sin(x)....this is a sinusoidal function oscillating between -1 and 1 as does the cos(x) function

    If you plot cos x and sin x, you will see something interesting which I will illustrate in the attached ...

    Solution Summary

    Sin 2x is found without using a calculator. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.