1
JEE Main 2019 (Online) 12th April Morning Slot
+4
-1
The equation y = sinx sin (x + 2) – sin2 (x + 1) represents a straight line lying in :
A
B
C
D
2
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
The value of sin 10º sin30º sin50º sin70º is :-
A
$${1 \over {36}}$$
B
$${1 \over {16}}$$
C
$${1 \over {32}}$$
D
$${1 \over {18}}$$
3
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
The value of cos210° – cos10°cos50° + cos250° is
A
$${3 \over 2} + \cos {20^o}$$
B
$${3 \over 4}$$
C
$${3 \over 2}(1 + \cos {20^o})$$
D
$${3 \over 2}$$
4
JEE Main 2019 (Online) 8th April Morning Slot
+4
-1
If cos($$\alpha$$ + $$\beta$$) = 3/5 ,sin ( $$\alpha$$ - $$\beta$$) = 5/13 and 0 < $$\alpha , \beta$$ < $$\pi \over 4$$, then tan(2$$\alpha$$) is equal to :
A
21/16
B
63/52
C
33/52
D
63/16
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