WB JEE 2009 | Trigonometric Functions & Equations Question 13 | Mathematics

WB JEE 2009

MCQ (Single Correct Answer)

-0.25

In triangle ABC, a = 2, b = 3 and sin A = 2/3, thne B is equal to

30$$^\circ$$

60$$^\circ$$

90$$^\circ$$

120$$^\circ$$

WB JEE 2009

MCQ (Single Correct Answer)

-0.25

Simplest form of $${2 \over {\sqrt {2 + \sqrt {2 + \sqrt {2 + 2\cos 4x} } } }}$$ is

sec x/2

sec x

cosec x

WB JEE 2009

MCQ (Single Correct Answer)

-0.25

If $$5\cos 2\theta + 2{\cos ^2}\theta /2 + 1 = 0$$, when $$(0 < \theta < \pi )$$, then the values of $$\theta$$ are

$${\pi \over 3} \pm \pi $$

$${\pi \over 3},{\cos ^{ - 1}}(3/5)$$

$${\cos ^{ - 1}}(3/5) \pm \pi $$

$${\pi \over 3},\pi - {\cos ^{ - 1}}(3/5)$$

WB JEE 2010

MCQ (Single Correct Answer)

-0.25

The value of $${{\sin 55^\circ - \cos 55^\circ } \over {\sin 10^\circ }}$$ is

$${1 \over {\sqrt 2 }}$$

$$\sqrt 2 $$

WB JEE Subjects