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Prove the following identities : (1 + ...

Prove the following identities :
`(1 + cot A - cosec A) ( 1 + tan A +sec A) = 2`

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Prove the following identities : (1)/ (tan A + cot A) = cosec A sin A

Prove the following identities : (cot A + cosec A - 1)/ (cot A - cosec A + 1) = (1 + cos A)/ (sin A)

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

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

Prove the following identities : (cot A - cosec A)^(2) = (1 - cos A)/(1 + cos A)

Prove the following identities : (sin A)/ (1 + cos A) = cosec A - cot A

Prove the following identities : sec A (1 - sin A) (sec A + tan A) = 1

Prove the following identities : (1 + cos A)/ (1 - cos A) + (tan^(2) A)/ (sec A - 1)^(2)

Prove the following identities : cosec A (1 + cos A) (cosec A - cot A) = 1

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ICSE-TRIGONOMETRICAL IDENTITIES-EXERCISE 21 (E)
  1. Prove the following identities : sec^(4) A (1 - sin^(4) A) - 2 tan^(...

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  2. Prove the following identities : cosec^(4) A (1 - cos^(4) A) - 2 cot...

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  3. Prove the following identities : (1 + cot A - cosec A) ( 1 + tan A +...

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  4. If sin A + cos A = p and sec A + cosec A = q , then prove that : ...

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  5. If x = a cos theta and y = bcot theta, show that : (a^(2))/(x^(2...

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  6. If sec A + tan A = p, show that : sin A = (p^(2) - 1)/(p^(2) + 1...

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  7. If tan A = n tan B and sin A = m sin B, prove that : cos^(2) A =...

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  8. if 2 sin A - 1 = 0, show that : sin 3 A = 3 sin A - 4 sin^(3) A

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  9. If 4 cos^(2) A - 3 = 0, show that : cos 3 A = 4 cos^(3) A - 3 co...

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  10. Evaluate without using trigonometric tables. 2(("tan" 35^(@))/("cot"...

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  11. Evaluate : sec 26^(@) sin 64^(@) + (cosec 33^(@))/(sec 57^(@))

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  12. Evaluate ( 5 sin 66 ^(@))/( cos 24 ^(@)) -( 2 cot 85^(@))/(tan 5^(@...

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  13. Evaluate cos 40 ^(@) cosec 50 ^(@)+ sin 50 ^(@) sec 40 ^(@)

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  14. Evaluate sin 27 ^(@) sin 63 ^(@) - cos 63^(@) cos 27 ^(@)

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  15. Evaluate : 3(sin 72^(@))/(cos 18^(@))-(sec 32^(@))/(cosec 58^(@))

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  16. Evaluate 3 cos 80 ^(@) cosec 10 ^(@) + 2 cos 59 ^(@) cosec 31 ^(@...

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  17. Evaluate : (cos 75^(@))/ (sin 15^(@)) + (sin 12^(@))/ (cos 78^(@)) -...

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  18. Prove that : tan (55^(@) + x) = cot (35^(@) - x)

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  19. Prove that : sec (70^(@) - 0) = cosec (20^(@) + 0)

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  20. Prove that : Sin( 28 ^(@) +A) = cos ( 62 ^(@) - A)

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