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[(sin A)/(1+cos A)+(1+cos A)/(sin A)=2co...

[(sin A)/(1+cos A)+(1+cos A)/(sin A)=2cos eCA],[],[=quad x^(2)quad quad quad " in "],[qquad [" is "],[" is "]]

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sin A(1+tan A)+cos A(1+cot A)=sec A+cos ecA

(sin A)/(sec A+tan A-1)+(cos A)/(cos ecA+cot A-1)=1

(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)

(1-sin A-cos A)^(2)=2(1-sin A)(1-cos A)

Prove: (1-cos A)/(1+cos A)=(cot A-cos ecA)^(2)

(cos ecA + sin A) (cos ecA-sin A) is equal to

(cos ecA) / (cos ecA-1) + (cos ecA) / (cos ecA + 1) = 2sec ^ (2) A

(1 + sin 2x + cos 2x )/( cos x + sin x ) = 2 cos x

Prove: (cos ecA)/(cos ecA-1)+(cos ecA)/(cos ecA+1)=2sec^(2)A

cos ecA-2cot2A cos A = 2sin A