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CONCEPT CLASSES FATEHGARH, , Glass 1" Wath's 9044716743, , 10,, , 11,, , 12., , 13., , 14., , 15., , 16., , 17., , 18., , 19., , 20., , 21., , The value of cos 0°. cos 1°. cos 2°. cos 3°... cos 89° cos 90° is, (a)1 {b) -1 (c)0 (d) ¥12, Ifx tan 45° sin 30° = cos 30° tan 30°, then x is equal to, , (a) V3 {b) 12 {c) ¥12 (d)1, , If x and y are complementary angles, then, , (a) sinx=siny (b) tan x = tany (c) cos x= cosy (d) sec x = cosec y, sin 2B = 2 sin B is true when B is equal to, , (a) 90° (b) 60° (c) 30° (d) 0°, , If A and (2A ~ 45°) are acute angles such that sin A = cos (2A ~ 45°), then tan A Is equal, to, , (ajo (b) v13 (1 (d) v3, Ify sin 45° cos 45° = tan2 45° - cos2 30°, theny = ..., , (a) -12 (b) 12 (c) -2 (d)2, , If sin 8 + sin* @ = 1, then cos* 0 + cost @ =., , (a) -1 (b) 0 (1 (dj2, , 5 tan* A-5 sec* A+ 1 is equal to, , (a) 6 (6) -5 {1 (d) -4, Ifx =acos 0 and y=b sin 0, then b2x2 + a2y2 =, , (a) ab (b) b* + a* (c) a*b* (d) atbt, What is the maximum value of 1cscA?, , (ajo (b) 1 (12 (d)2, What is the minimum value of sin A, 0s As 90°, , (a) -1 (b) 0 {ct (d) 12, What is the minimum value of cos 6, 0 = 6 = 90°, , (a)-1 {b) 0 {1 (d) 12, , If cos 9A = sin A and 9A < 90°, then the value of tan 5A is, , (ajo {b) 1 (o) ¥13 (d) v3, Ifin AABC, ZC = 90°, then sin (A + B) =, , (a) 0 (b) % (c) V12 (d)1, Ifsin A - cos A= 0, then the value of sin’ A + cast Ais, , (a)2 (b) 1 (c) 34 (d) 12, , In 4 ABC, right-angled at B, AB = 24 cm, BC = 7 cm. The value of tan C is:, , (a) 12/7 (b) 24/7 (c) 20/7 (d) 7/2, (Sin 30°+cos 60°)-(sin 60° + cos 30°) is equal to;, , (a)0 (b) 142V3 (c) 1-V3 (d) 14v3, The value of tan 60°/cot 30° is equal to:, , (a0 (b)1 (c)2 (d) 3, , 1 - cos?A is equal to:, , (a) sintA (b) tanzA (c) 1- sintA (d) seczA, sin (90° - A) and cos A are:, , (a) Different (b) Same (c) Not related (d) None of these, , If cos X = % then tan X is equal to:, (a) 5/2 (b) v(5/2) (c) V5/2 (a) 2/v5

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22., , 23., , 24., , 25., , 26., , 27., , 28., , 29., , 30., , 31., , 32., , 33., , 34,, , 35., , If cos X = a/b, then sin X is equal to:, , (a) (b?-a?) /b (b) (b-a)/b (c) Vibi-a")/b (d) ¥(b-a)/b, The value of sin 60° cos 30° + sin 30° cos 60° is:, , (ayo {b) 1 (c)2 (d) 4, , 2 tan 30°/(1 + tan®30°) =, , (a) sin 60° (b) cos 60° {c) tan 60° (d) sin 30°, sin 2A = 2 sin Ais true when A=, , (a) 30° (b) 45° (c) 0° (d) 60°, , The value of (sin 45° + cos 45") is, , (a) 1/v2 {b) v2 (c) ¥3/2 (d)1, , If sin A= 1/2, then the value of cot Ais, , (a) v3 (b) 1/¥3 (c) ¥3/2 (d)1, , If AABC is right angled at C, then the value of cos(A+B) is, , (a) (b) 1 (O% (d) v3/2, The value of (tan 1° tan 2° tan 3° ... tan 89°) is, , (a)0 (b) 1 (2 (d) 1/2, , The value of the expression [cosec (75° + 8) ~ sec (15° - 6) ~ tan (55° + 8) + cot (35° , 8)] is, , (a) -1 (b) 0 (c)1 (d) 3/2, If cos(a + B) = 0, then sin(a - 8) can be reduced to, , (a) cos B (b) cos 2B (c) sina (d) sin 2a, Ifsin A + sin*A = 1, then the value of the expression (cos’A + costA) is, , (aj1 (b) 1/2 (c)2 (d)3, , If cos 9a = sina and 9a < 90°, then the value of tan 5a is, , (a) 1/v3 (b) V3 (o1 (d) 0, The value of the expression sin®6 + cos*# + 3 sin?6 cos?6 is, , (a) oO (b) 3 (2 (d)1, (sin30° + cos30°) - (sin 60° + cos60°), , (A)-1 (B)0 (c)1 (D)2, , S4L3N 2164 By Sachin Bhaiya