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  1. The numerical value of
    cos² 45°
    		+
    cos² 60°
    		-
    tan² 30°
    		-
    sin² 30°
    		is
    sin² 60°sin² 45°cot² 45°cot² 30°
    1. 1
      1
      4
    2. 3
      4
    3. 1
      4
    4. 1
      2
Correct Option: B

cos² 45°
+
cos²60°
-
tan²30°
-
sin²30°

sin²60°sin²45°cot²45°cot²30°


=
1
×
4
+
1
× 2 -
1
× 1 -
1

23434 × 3

=
2
+
1
-
1
-
1

32312

=
8 + 6 - 4 - 1
=
9
=
3

12124


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