How Do I Establish This Identity? Please Help?
cot(sec + sin) = 1/sin + cos
Also: 2sin^3 cos + 2sin cos^3 = sin2
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cotθ(secθ + sinθ) = 1/sinθ + cos θ
Also: 2sin^3θ cosθ + 2sinθ cos^3θ = sin2θ
-Anonymous
Also: 2sin^3θ cosθ + 2sinθ cos^3θ = sin2θ
cotA(secA+sinA)
= (cosA/sinA)(1/cosA + sinA)
= 1/sinA + cosA
------------------------
2sin^3 A.cosA + 2sinA.cos^3 A
= 2sinA.cosA(sin^2 A + cos^2 A)
= sin2A
---------
-Anonymous
= (cosA/sinA)(1/cosA + sinA)
= 1/sinA + cosA
------------------------
2sin^3 A.cosA + 2sinA.cos^3 A
= 2sinA.cosA(sin^2 A + cos^2 A)
= sin2A
---------
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