1
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The value of $$\begin{aligned} \cos \left(18^{\circ}-\mathrm{A}\right) \cdot \cos ( & \left.18^{\circ}+\mathrm{A}\right) \\ & -\cos \left(72^{\circ}-\mathrm{A}\right) \cos \left(72^{\circ}+\mathrm{A}\right) \text { is }\end{aligned}$$

A
$$\cos 72^{\circ}$$
B
$$\sin 54^{\circ}$$
C
$$\sin 18^{\circ}$$
D
$$\cos 54^{\circ}$$
2
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+2
-0

$$\cos ^2 48^{\circ}-\sin ^2 12^{\circ}=$$ _________, if $$\sin 18^{\circ}=\frac{\sqrt{5}-1}{4}$$

A
$$\frac{-\sqrt{5}+1}{8}$$
B
$$\frac{\sqrt{5}-1}{8}$$
C
$$\frac{\sqrt{5}+1}{8}$$
D
$$\frac{-\sqrt{5}-1}{8}$$
3
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

If $$\tan \theta=\frac{\sin \alpha-\cos \alpha}{\sin \alpha+\cos \alpha}, 0 \leq \alpha \leq \frac{\pi}{2}$$, then the value of $$\cos 2 \theta$$ is

A
$$\cos 2 \alpha$$
B
$$\sin \alpha$$
C
$$\cos \alpha$$
D
$$\sin 2 \alpha$$
4
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The value of $$\tan \left(\frac{\pi}{8}\right)$$ is _________.

A
$$\sqrt{2}-1$$
B
$$1-\sqrt{2}$$
C
$$\sqrt{2}$$
D
$$\sqrt{2}+1$$
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