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  1. 2sin68°
    		-
    2cot15°
    		-
    3tan45°.tan20°.tan40°.tan50°.tan70°
    		is equal to
    cos22°5tan75°5
    1. - 1
    2. 0
    3. 1
    4. 2
Correct Option: C

2sin 68°
-
2cot 15°
-
3tan 45° . tan 20° . tan 40° tan 50° tan 70°

cos 22°5tan 75°5

= 2
cos22°
-
2tan 75°
-
3.tan 20° . cot 20°tan 40° . cot 40°

cos 22°5tan 75°5

= 2 -
2
-
3
55

=
10 - 2 - 3
= 1
5


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