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2012 I Questions and Answers

2012 I QUESTIONS AND ANSWERS :: part10 : 6 to 10

Following Multiple choice objective type questions and answers will help you as a free online coaching for your TRB SSC CGL written exam preparation for 2017. These are useful study materials collected from previous year question papers. :

6.The simplified value of (1+tanƟ+secƟ)(1+cotƟ-cosecƟ) is

-2

-1

7.If sin²α=cos³α,then the value of (cot⁶α-cot²α) is

-1

8.The angle of elevation of the top of a tower standing on a horizontal plane from two points on a line passing through the foot of the tower at a distance 9 ft and 16 ft respectively are complementary angles.Then the height of the tower is

9 ft

12 ft

16 ft

144 ft

9.sinƟ-cosƟ+1 / sinƟ + cosƟ -1(where Ɵ≠ π/2) is equal to

1+sinƟ / cos Ɵ

1-sinƟ/ cos Ɵ

1-cosƟ/sinƟ

1+cosƟ /sinƟ

10.If cos⁴α / cos²β + sin⁴α / sin²β=1 ,then the value of cos⁴α / cos²β + sin⁴α / sin²β=1 is

1/8