NCERT Solution Class X Mathematics Introduction to Trigonometry Question 2 (Ex 8.4)

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Question 2:

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

Answer:

We know that,

cos A= 1/sec A

Also, sin2 A + cos2 A = 1

sin2 A = 1 − cos2 A

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