Trigonometry Important Questions for Competitive Exams
рдпрджрд┐┬а$$ sin ╬╕ ={20 \over 29}$$, ┬ард╣реИ┬а┬арддреЛ┬аsec┬а╬╕ sin┬а╬╕┬ардХрд╛ рдорд╛рди рдХреНрдпрд╛ рд╣реИ?
(A) $$ {20 \over 21}$$
(B) $$ {29 \over 20}$$
(C) $$ {21 \over 20}$$
(D) $$ {21 \over 29}$$
Correct Answer : A
рдпрджрд┐┬а┬аx cos2300.sin600=$${tan^2{45}^0.sec60^0}\over cosec\ 60^0$$┬ард╣реИ рддреЛ┬аx рдХрд╛ рдорд╛рди рд╣реЛрдЧрд╛┬а?┬а
(A) $$ 1\over \sqrt { 3} $$
(B) $$ 2{2\over 3} $$
(C) $$ 1\over \sqrt { 2} $$
(D) $$ {1\over 2} $$
Correct Answer : B
$${cosec^2} 18┬░ -{1\over cot^272┬░}$$.┬ардХрд╛ рдорд╛рди рд╣реИ|
(A) $${1 \over \sqrt { 3}}$$
(B) $$ \sqrt2\over {3 } $$
(C) $${1\over2} $$
(D) 1
Correct Answer : D
(A) cosec A
(B) cos A
(C) secA
(D) sinA
Correct Answer : C
рдпрджрд┐┬а$$ sin(╬╕+30^0)= {3\over \sqrt { 12} } ┬а$$┬ард╣реИ рддреЛ┬аcos2╬╕┬ардХрд╛ рдорд╛рди рдЬреНрдЮрд╛рдд рдХрд░реЗрдВ┬а?
(A) $$ {1\over 4} $$
(B) $$ {3\over 4} $$
(C) $${\sqrt { 3} \ }\over 2 $$
(D) $$ {1\over 2} $$
Correct Answer : B
(A) $$\left(1{75\over119}\right)\ $$
(B) $$\left(2{34\over35}\right)\ $$
(C) $$\left(3{2\over3}\right)\ $$
(D) $$\left(3{1\over7}\right)\ $$
Correct Answer : D
рдпрджрд┐┬а4sin2 ╬╕ тАУ 1 = 0┬а┬ардФрд░ рдХреЛрдг┬а╬╕<900┬ард╕реЗ рдХрдо рд╣реИ ред рддреЛ┬аcos2 ╬╕ + tan2┬а╬╕┬ардХрд╛ рдорд╛рди рдХреНрдпрд╛ рд╣реЛрдЧрд╛┬а?
(рдорд╛рдирд╛┬а00 < ╬╕ < 900┬а)┬а
(A) $$ 13\over 12$$
(B) $$ 12\over 11$$
(C) $$ 11\over 9$$
(D) $$ 17\over 15$$
Correct Answer : A
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Vikram Singh
Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.
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