RRB Assistant Loco Pilot and Technician Model Paper 6 with solutions

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Question : 12 of 75

Marks: +1, -0

The value of

{ 3 \sin 62 ^ { \o } } /{ \cos 28 ^ { \o } } - { \sec 42 ^ { \o } }/ { \co \sec 48 ^ { \o } }

is:

0
1
–1
2

Solution:

{ 3 \sin 62 ^ { \o } } /{ \cos 28 ^ { \o } } - { \sec 42 ^ { \o } }/ { \co \sec 48 ^ { \o } }

=

{ 3 \sin ( 90 ^ { \o } - 28 ^ { \o } ) }/ { \cos 28 ^{ \o } } - { \sec 42 ^ { \o } }/ { \cosec ( 90 - 42 ^ { \o } ) }

=

{ 3 \cos 28 ^ { \o } }/ { \cos 28 ^{ \o } } - { \sec 42 ^ { \o } }/ { \sec 42 ^ { \o } }

= 3 – 1 = 2.

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