1
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
Given $$A = {\sin ^2}\theta + {\cos ^4}\theta $$ then for all real values of $$\theta $$
A
$$1 \le A \le 2$$
B
$${3 \over 4} \le A \le 1$$
C
$${13\over 16} \le A \le 1$$
D
$${3 \over 4} \le A \le {{13} \over {16}}$$
2
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
The smallest positive integer n for which $${\left( {{{1 + i} \over {1 - i}}} \right)^n} = 1$$ is
A
$$n = 8$$
B
$$n = 16$$
C
$$n = 12$$
D
none of these
3
IIT-JEE 1980
Subjective
+2
-0
Find the real values of x and y for which the following equation is satisfied $$\,{{(1 + i)x - 2i} \over {3 + i}} + {{(2 + 3i)y + i} \over {3 - i}} = i$$
4
IIT-JEE 1980
Subjective
+2
-0
Given $$\alpha + \beta - \gamma = \pi ,$$ prove that
$$\,{\sin ^2}\alpha + {\sin ^2}\beta - {\sin ^2}\gamma = 2\sin \alpha {\mkern 1mu} \sin \beta {\mkern 1mu} \cos y$$
JEE Advanced Papers
EXAM MAP