SSC CGL 30 Aug 2015 Paper

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Question : 120 of 200

Marks: +1, -0

The value of cos230° + sin260° + tan245° + sec260° + cos0° is

4 $1/2$
5 $1/2$
6 $1/2$
7 $1/2$

Solution:

cos230° + sin260° + tan245° + sec260° + cos0°
=

(√3/2)^2+(√3/2)^2+(1)^2+(2)^2

+ 1
=

3/4 + 3/4

+ 1 + 4 + 1
= 6 +

{3+3}/4

= 6 +

6/4

= 6 +

3/2

=

{12+3}/2

=

{15}/2

= 7

1/2

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