Page 253 - sscbbb

[A] 46 [B] 42 [C] 44 [D] 48
177. The angles of elevation of the top of a tree 220 meters high from two points lie on the same plane are 30° and 45°. What is the distance (in metres) between the two points?
220भीटयऊॉचेएकिऺृ के शीषणसे,सभानतरऩयजस्थतदोबफन्दओु ॊकाउन्नमनकोण30°औय45° है। दो बफन्दओु ॊ के फीच दयू ी(भीटय भें) ककतनी है? 21 February 2018 SSC MAINS
[A] 193.22 [B] 144.04 [C] 176.12 [D] 161.05
178. The angles of elevation of the top of a tower 72 metre high from the top and bottom of a building are 30° and 60° respectively. What is the height (in metres) of building?
एक72भीटयऊॉचेटाियके शीषणसे,एकइभायतके शीषणितरके उन्नमनकोणक्रभश्30°औय60°
है। इभायत की उॊ चाई (भीटय भें) क्मा है? [A] 42 [B] 20√3
21 February 2018 SSC MAINS
[C] 24√3 [D] 48
179. What is the value of
- 1 का भान क्मा है?
[A] sin 2θ [B] sin2θ 180. What is the value of
का भान क्मा है?
[A] 2 cot A [B] 2 tan A
181. What is the value of cos 15° – cos 165°?
cos 15° – cos 165° का भान क्मा है? [A] √3/√2 [B] 2/(√3 – 1)
- 1 ?
09 March 2018 SSC MAINS
[C] cos2θ [D] cos 2θ ?
09 March 2018 SSC MAINS
[C] cot A [D] tan 2A
09 March 2018 SSC MAINS
[C] (√3 + 1)/ √2 [D] (√3 + 1)/2
182. If P + Q + R = 60°, then what is the value of cos Q cos R (cos P – sin P) + sin Q sin R (sin P – cos P)?
मदद P + Q + R = 60°, तो cos Q cos R (cos P – sin P) + sin Q sin R (sin P – cos P) का भान क्मा है? 09 March 2018 SSC MAINS
[A] 1⁄2 [B] √3/2 [C] 1/√2 [D] √2 183. What is the value of [1 - tan (90 - θ)]2 / [cos2 (90 - θ)] -1?
[1-tan(90-θ)]2/[cos2(90-θ)]-1का भान क्मा है?
09 March 2018 SSC MAINS
[A] – sin 2θ [B] – cos 2θ [C] cos 2θ [D] sin 2θ 184. Whatn is the value of [1 + 2 cot2 (90 - x) - 2 cosec (90 - x) cot (90 - x)]/ [ cosec (90 - x) - cot (90 - x)]?
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