i was wondering if ANYONE could help me with some proofs i missed a couple days of trig. and im totally lost so here they are
1. 1-cos(2a)/sin(2a)=tana
2. cos(2a)= 1-tan^2a/1+tan^2a
3. tan(2a)= 2/cota-tana
thanks in advance
i was wondering if ANYONE could help me with some proofs i missed a couple days of trig. and im totally lost so here they are
1. 1-cos(2a)/sin(2a)=tana
2. cos(2a)= 1-tan^2a/1+tan^2a
3. tan(2a)= 2/cota-tana
thanks in advance