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Class 12th CBSE 2015 Mathematics Paper Set 1

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Class-12th CBSE
Subject-Mathematics Set 1
year-2015

Here is some questions:-
SECTION-A
1. If a line makes angles 90°, 60° and θ with x, y and z-axis respectively, where θ is acute, then find θ.
SECTION-B
1. An unbiased coin is tossed 4 times. Find the mean and variance of the number of heads obtained.
SECTION – C
1. Let N denote the set of all natural numbers and R be the relation on N × N defined by (a, b) R (c, d) if ad(b + c) = bc(a + d). Show that R is an equivalence relation.

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