Q4 of 34 Page 193

Choose the correct option. Justify your choice.

Following is the explanation:


9 sec2 A – 9 tan2 A


= 9 (sec2 A – tan2 A)


= 9 x 1


= 9

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2

Write all the other trigonometric ratios of ∠ A in terms of sec A

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Evaluate:


(i)


(ii) Sin 25° Cos 65° + Cos 25° Sin 65°

 4

Choose the correct option. Justify your choice.

 4

Choose the correct option. Justify your choice.

(Sec A + tan A) (1 – sin A) =