Trig

posted by .

Prove (cos^2t+4cos^2+4)/(cost+2)=2sect+1)/sect

Similar Questions

1. Math - Trig - Double Angles

Prove: cos4x = 8cos^4x - 8cos^2x + 1 My Attempt: RS: = 4cos^2x (2cos^2x - 1) + 1 = 4 cos^2x (cos2x) + 1 LS: = cos2(2x) = 2cos^2(2x) - 1 = (cos^2(2)) - cos^2(2x)) - 1 ----- Prove: 8cos^4x = cos4x + 4cos2x + 3 My Attempt: RS: = cos2(2x) …
2. Math - Solving Trig Equations

What am I doing wrong? Equation: sin2x = 2cos2x Answers: 90 and 270 .... My Work: 2sin(x)cos(x) = 2cos(2x) sin(x) cos(x) = cos(2x) sin(x) cos(x) = 2cos^2(x) - 1 cos(x) (+/-)\sqrt{1 - cos^2(x)} = 2cos^2(x) - 1 cos^2(x)(1 - cos^2(x))
3. Trig

tan^2t/sect=sect-cost cott^2/csct=csct-sint
4. trig

By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx
5. Trig

(cos^2t+4cos^2+4)/(cost+2)=(2sect+1)/sect
6. Trig

Prove cos^2t+4cost+4/cost+2=2sect+1/sect
7. Trig

Prove cos^2t+4cost+4/cost+2=2sect+1/sect
8. trig

Q1: Prove cos^2t+4cost+4/cost+2=2sect+1/sect Q2: A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from …
9. Trig

Prove cos^2t+4cost+4/cost+2=2sect+1/sect
10. trig

prove that the equation 2sin x cos x +4cos^2 x =1 may be written in the form of tan^2 x -2tan x -3=0

More Similar Questions