Answer to Question #2670 in Trigonometry for aidan

Question #2670

Prove that:&
cos (θ-φ ) - sin (θ+φ/2) =-2 cos θ

Expert's answer

This formula is not correct:
If θ=φ=0, then
The left-hand side is equal to
& cos 0 – sin 0 = 1,
while the right-hand side is
-2cos0 = -2

Learn more about our help with Assignments: Trigonometry

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. & & The Statue of Liberty is 46 feet tall, and stands on a platform 47 feet tall. How far f
2. The length of a ramp is 150cm. Use trigonometry to show that when the angle, a (Located where the di
3. What steps would you take to verify this? Thank you!!! :) (1-cos^2(x)) / ((1-sinx) (1+sinx)) = tan^2
4. Re-write r=5sin(θ) in Cartesian coordinates.
5. How do I find the general sloution: sin3x+sin2x=0.
6. A student stands a certain distance from a building and measures the angle to the top of the buildin
7. A ship travels 18.5 km on a course of 31.2 degrees south of east, then 12.7 km due south, then 21.5