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UP Board Solutions for Class 10 Maths Chapter 8, Quadratic Equations, , 1. frefatad & am frepfea :, , (i) sin 60° cos 30° + sin 30° cos 60 (ii) 2 tan? 45° + cos* 30° — sin’ 60, , cos 45 sin 30° + tan 45° — cosec 60°, , (iii) a aang (iv), sec 30° + cosec 30) sec 30° + cos 60° + cot 45, , 5 cos” 60° + 4 sec” 30° — tan” 45°, (v) > >, sin” 30° + cos 30°, , . 2 tan 30°, © T+ tan? 30°, , (A) — sin60 (B) cos 60 (©) tan 60 (D) sin 30, , 1— tan? 45°, , 1+ tan? 45°, , (A) tan 90° (B) | (©) sin45 (D) 0, , sin 2A=2sinA 4 OI Ca @, Fath ATTA 2:, , (A) 6 (B) 30 (©) 45 (D) 60°, , 2 tan 30°, , 1— tan? 30° WR:, , {iv), (A) cos 60) (B) sin 60 (C) tan 60 (D) sin 30', 3. af&tan(A+B)= J3 ARtan(A B)= 7:0 <A+B<90°;A>Bal ASRB I AA, aa afar, . Fae fer Frafatad A ara Fea S aT tas SH Bled SA TH aT Yfke, arts, (i) sin(A+B)=sinA+sin B., di) 04 ofe GA & asin & an 4 hoofs at 21, di) 0 4 of AS aa cose & UM A tafe att 21, (iv) 6 & Git APH WT sin@=cos@, (v) A=0° ® cot A Utatad Ae Z, , (i) sin 60° cos 30° + sin 30° cos 60° (ii) 2 tan? 45° + cos? 30° - sin? 60°, (ii) cos 45° (iv) sin 30° + tan 45° - cosec 60°, sec 30° + cosec 30° sec 30° + cos 60° + cot 45°, 5 cos” 60° + 4 sec” 30° - tan” 45°, , (v), sin” 30° + cos” 30°, , FOR VIDEO SULUTION AND SUBSCRIBE OUR CHANNEL ASQUARE ACADEMY, FOR MORE SOLUTION

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5 cos” 60° + 4 sec” 30° - tan? 45°, sin” 30° + cos” 30°, , ({v), , . 32 BN° sac? 3()° — tan? 45°, , za wea ?: 5 cos* 60' + 4 s0¢ So tan* 45, sin? 30° + cos” 30°, , 2 tan 30°, 1+ tan? 30°, (A) sin 60° (B) cos 60° (D) sin 30°, 1-tan? 45° _, 1+ tan? 45°, (A) tan 90° (B)1 (C) sin 45° (D) 0, Gii) sin 2A =2 sin Aaa ae Bim %, Wats A ara 2:, (A) 0° (B) 30° (C) 45° (D) 60°, 2 tan 30 — é:, 1- tan?” 30°, (A) cos 60° (B) sin 60° (D) sin 30°, , (ii), , (iv), , 2 tan 30°, , we @ 1+ tan* 30°, , ara: fared (A) Bet 21, 1-tan? 45, l+tan? 45, ara: faned (D) Het 21, ii) Wa A=08, A eA wa aia 2:, sin2A = sin 2(0°)=sin 0°=0, 2sinA 2sin0=2x0=0, Le., sin2A = 2sinA for A=0°, aa: farenea (A) Fel BI, , (ui), , FOR VIDEO SULUTION AND SUBSCRIBE OUR CHANNEL ASQUARE ACADEMY, FOR MORE SOLUTION