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Standard XII
Mathematics
Standard Formulae - 1
43. tan[÷ 4-c...
Question
43. tan[÷ 4-cos inverse 4÷ 5]
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Q.
(
1
4
+
1
4
2
+
1
4
3
−
−
−
−
+
1
4
n
−
1
)
Q.
What is the present age of Tanya?
I.
The ratio between the present ages of Tanya and her brother Rahul is 3 : 4 respectively.
II.
After 5 years the ratio between the ages of Tanya and Rahul will be 4 : 5.
III.
Rahul is 5 years older than Tanya.
Q.
sin
47
°
cos
43
°
2
+
cos
43
°
sin
47
°
2
-
4
cos
2
45
°
Q.
sin 47°cos 43° + cos 47°sin 43° = ?
(a) sin 4°
(b) cos 4°
(c) 1
(d) 0
Q.
Write the additive inverse of
43
9
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