Hello. Thanks for any help in advance.

just having trouble with the method of eliminating θfrom thefollowing pairs of equations:

a. x = 2 cosθ, y = 2 sin θ

b. x = b tan, y = a sec θ

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- June 26th 2010, 11:29 PMshimmerbladetrig identities: eliminating θ
Hello. Thanks for any help in advance.

just having trouble with the method of eliminating θ*from the*following pairs of equations:

a. x = 2 cosθ, y = 2 sin θ

b. x = b tan, y = a sec θ - June 27th 2010, 12:22 AMProve It
- June 27th 2010, 04:20 PMshimmerblade
for b. x = b tan θ, y = a sec θ would it be something like

(b tan θ)^2 + 1 = (a sec θ)^2

b^2 tan^2 θ + b^2 a^2 = a^2 sec^2 θ

b^2 (tan^2 θ + a^2)^2 = a^2 (sec^2 θ)

b^2 x^2 + a^2 b^2 = a^2 y^2

not too sure....=\ - June 27th 2010, 04:22 PMProve It
- June 28th 2010, 03:44 PMshimmerblade
ok thanks for your help. (Happy)