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If sin A = 35⁢and⁢cos⁡𝐵 =1213, evaluate: sec2A - Mathematics

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Question

If sin A = `3/5 and cos B = 12/13`, evaluate:

sec2A

Sum
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Solution

Given

sin⁡ A = `3/5 ⇒ cos A = 4/5`

Sec2 A = `(1/cos A)^2`

= `(5/4)^2`

= `25/16`

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Chapter 19: Trigonometry - EXERCISE 19A [Page 231]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 19 Trigonometry
EXERCISE 19A | Q II. 8. (i) | Page 231
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