(1-cos a)(1+cos a)=? sin^2 a/1-cos a=? cos a tg a=? sin^2 a+cos^2 a+tg^2 a=? cos^4...

Question

(1-cos a)(1+cos a)=?

sin^2 a/1-cos a=?

cos a tg a=?

sin^2 a+cos^2 a+tg^2 a=?

cos^4 a-sin^4 a=?

Answer 1

I hope this helps you

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