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VanKwisH
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More Trig Identity Proofs ...
1. cot^2x - 1 = cot2x
-----------
2cotx2. tanx + cotx = 2csc2x3. cos(A+B) = 1-tanAtanB
--------- ----------
cos(A-B) 1+tanAtanB
Anyone how to do these proofs??
i've tried simplifying all of these as much as i could but i don't seem to get the
right answer ... can anyone show me?
Homework Statement
1. cot^2x - 1 = cot2x
-----------
2cotx2. tanx + cotx = 2csc2x3. cos(A+B) = 1-tanAtanB
--------- ----------
cos(A-B) 1+tanAtanB
Homework Equations
The Attempt at a Solution
Anyone how to do these proofs??
i've tried simplifying all of these as much as i could but i don't seem to get the
right answer ... can anyone show me?
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