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(1)/(cos theta-tan A)-(1)/(cos n)=(1)/(c...

(1)/(cos theta-tan A)-(1)/(cos n)=(1)/(cos A)-(1)/(sec A+cos A)

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(1)/(sec A-tan A)-(1)/(cos A)=(1)/(cos A)-(1)/(sec A+tan A)

(1)/(sec A-tan A)-(1)/(cos A)=(1)/(cos A)-(1)/(sec A+tan A)

Show that (i) sin^(8)A-cos^(8)A=(sin^(2)A-cos^(2)A)(1-2sin^(2)A.cos^(2)A) (ii) (1)/(sec A-tan A)-(1)/(cos A)=(1)/(cos A)-(1)/(sec A + tan A)

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Prove that: (1)/(sec A - tan A) - (1)/(cos A) = (1)/(cos A) - (1)/(sec A + tan A)

Prove the trigonometric identities: (1)/( sec A+tan A)-(1)/(cos A)=(1)/(cos A)-(1)/(sec A-tan A)

Prove that (1)/((sec theta - tan theta))-(1)/(cos theta)=(1)/(cos theta)-(1)/((sec theta+ tan theta)).

Show that: 1/(sec A-tan A) - 1/(cos A) = 1/(cos A) - 1/(sec A + tan A)

Prove the following identity : 1/(sec theta+tan theta) -1/(cos theta) = 1/(cos theta) - 1/(sec theta-tan theta) .