यदि  है, तो cos2x + sec2x का मान ________ होगा।

This question was previously asked in
SSC CGL 2023 Tier-I Official Paper (Held On: 26 Jul 2023 Shift 3)
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Answer (Detailed Solution Below)

Option 4 :
vigyan-express
Free
PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
25 Qs. 50 Marks 10 Mins

Detailed Solution

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दिया गया है:

प्रयुक्त संकल्पना:

Secx = 1/Cosx

गणना:

माना cosx = a है, तब secx = 1/a

प्रश्न के अनुसार,

⇒ a + 1/a = 7/2√3

⇒ a2 + 1/a2 = (7/2√3)2 - 2

⇒ a2 + 1/a2 = 25 /12

∴ सही विकल्प 4 है

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