1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$\sum_\limits{k=0}^{440} i^k=x+i y \Rightarrow x^{100}+x^{99} y+x^{242} y^2+x^{97} y^3=$$

A
0
B
$$-$$4
C
4
D
1
2
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A true statement among the following identities is

A
$$\sin 5 \theta=16 \cos ^4 \theta \sin \theta-12 \cos ^2 \theta \sin \theta+\sin \theta$$
B
$$\sin 5 \theta=16 \cos ^4 \theta-12 \cos ^2 \theta+1$$
C
$$\sin 5 \theta=16 \cos ^4 \theta \sin \theta+12 \cos ^2 \theta \sin \theta-\sin \theta$$
D
$$\sin 5 \theta=16 \cos ^4 \theta \sin \theta+12 \cos ^2 \theta \sin \theta+\sin \theta$$
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $$e^{i \theta}=\operatorname{cis} \theta$$, then $$\sum_\limits{n=0}^{\infty} \frac{\cos (n \theta)}{2^n}=$$

A
$$(4+2 \cos \theta) /(5-4 \cos \theta)$$
B
$$(4-2 \cos \theta) /(5+4 \cos \theta)$$
C
$$(4-2 \cos \theta) /(5-4 \cos \theta)$$
D
$$(4+2 \cos \theta) /(5+4 \cos \theta)$$
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $$f(f(0))=0$$, where $$f(x)=x^2+a x+b, b \neq 0$$, then $$a+b=$$

A
2
B
1
C
$$-$$1
D
$$-$$2
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