given cos θ = 3/5, tan θ < 0

find:

sin 2θ

cos 2θ

cot 2θ

use half measure identities to find exact values of the following:

tan 15 degrees

sec π/12

THANK YOU SO MUCH!

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- February 23rd 2009, 12:16 AMpongpongbasic trigonometry problems, help?
given cos θ = 3/5, tan θ < 0

find:

sin 2θ

cos 2θ

cot 2θ

use half measure identities to find exact values of the following:

tan 15 degrees

sec π/12

THANK YOU SO MUCH! - February 23rd 2009, 12:28 AMmathaddict
- February 23rd 2009, 12:41 AMmathaddict