Ex 8.2, 2 (ii) (MCQ) - Chapter 8 Class 10 Introduction to Trignometry

Last updated at Dec. 16, 2024 by

 

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Ex 8.2, 2 Choose the correct option and justify your choice : (ii) (๐Ÿ โˆ’ใ€– ๐’•๐’‚๐’ใ€—^๐Ÿโกใ€–๐Ÿ’๐Ÿ“ยฐใ€—)/(๐Ÿ +ใ€– ๐’•๐’‚๐’ใ€—^๐Ÿโกใ€–๐Ÿ’๐Ÿ“ยฐใ€— ) = tan 90ยฐ (B) 1 (C) sin 45ยฐ (D) 0 We know that, tan 45ยฐ = 1 So, (๐Ÿ โˆ’ใ€– ๐’•๐’‚๐’ใ€—^๐Ÿโกใ€–๐Ÿ’๐Ÿ“ยฐใ€—)/(๐Ÿ +ใ€– ๐’•๐’‚๐’ใ€—^๐Ÿโกใ€–๐Ÿ’๐Ÿ“ยฐใ€— ) = (1 โˆ’ (1)^2)/(1 + (1)^2 ) = (1 โˆ’ 1)/(1 + 1) = 0/2 = 0 So, the correct answer is (d) = 0 So, the correct answer is (d)

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