trigno help (sinA+cosA)(sinA+cosA)+(cosA+secA)=7+tanA.tanA+cotA.cotA?

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2006-10-01 04:33:57 · 2 answers · asked by araamdude 1 in Education & Reference ➔ Homework Help

SinA SinA + CosA SinA + SinA CosA + CosA CosA = (Sin A)^2 + (Cos A)^2 + 2 SinA CosA = 1 + 2 SinA Cos A

Plus the rest that I couldn't read...

2006-10-01 04:39:23 · answer #1 · answered by Ivan 5 · 0⤊ 0⤋

sin^2 A+cos^2 A+sin2A
+cosA+1/sinA=7+sin^2 A /cos^2 A+cos^2A/sin^2 A
Try to show LHS=RHS

2006-10-01 11:40:32 · answer #2 · answered by iyiogrenci 6 · 0⤊ 0⤋