Ask a New Question

Use the Pythagorean Identify to show that the double angle formula for cosine can be written as:

cos2x = 2cos^2x - 1

1 answer

cos2x

Ask a New Question or answer this question.

Similar Questions

Use the Pythagorean identity to show that the double angle formula for cosine can be written asa) cos2x = 1 - 2sin^2x b) cos2x =
1. 1 answer
i have to use pythagorean theorem to find the leg-measure of x. in the formula, x would be a^2. the hypotenuse is 11 and "b" is
1. 1 answer
Express as a single sine or cosine function (note: this is using double angle formulas)g) 8sin^2x-4 I just don't get this one. I
1. 3 answers
A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in
1. 4 answers

more similar questions