All Precalculus Resources
Example Question #1 : Prove Trigonometric Identities
To simplify , find the common denominator and multiply the numerator accordingly.
The numerator is an identity.
Substitute the identity and simplify.
Example Question #2 : Proving Trig Identities
Evaluate in terms of sines and cosines:
Convert into its sines and cosines.
Example Question #3 : Proving Trig Identities
Please choose the best answer from the following choices.
Simplify the following:
Already in simplified form.
First factor out sine x.
Notice that a Pythagorean Identity is present.
The identity needed for this problem is:
Using this identity the equation becomes,