Q4 of 34 Page 193

Choose the correct option. Justify your choice.

(Sec A + tan A) (1 – sin A) =

=

=

= (1 – sin2A)/cosA

= cos2A/cosA

= cos A

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4

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 4

Choose the correct option. Justify your choice.

 4

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 5

Prove the following identities, where the angles involved are acute angles for which the expressions are defined.


(i)


(ii)


(iii)


(iv)


(v) using the identity


(vi)


(vii)


(viii)


(ix) [Hint: Simplify LHS and RHS separately]


(x)