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
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Originally Posted by bkstudent14 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 Hi As usual my advice is 1) learn ans know perfectly the trig identities 2) practice a lot
Originally Posted by bkstudent14 2. cos(2a)= 1-tan^2a/1+tan^2a
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