32
MCQ (Single Correct Answer)
If $\tan \theta=\frac{1}{2}$ and $\tan \phi=\frac{1}{3}$, then the value of $\theta+\phi$ is
A
$\frac{\pi}{6}$
B
$\pi$
C
0
D
$\frac{\pi}{4}$
33
MCQ (Single Correct Answer)
Which of the following is not correct?
A
$\sin \theta=-\frac{1}{5}$
B
$\cos \theta=1$
C
$\sec \theta-\frac{1}{2}$
D
$\tan \theta=20$
34
MCQ (Single Correct Answer)
The value of $$\tan 1\Upsilon\tan 2\Upsilon\tan 3\Upsilon...~\tan89\Upsilon$$ is
A
0
B
1
C
$\frac{1}{2}$
D
Not defined
35
MCQ (Single Correct Answer)
The value of $\frac{1-\tan ^2 15 \Upsilon}{1+\tan ^2 15 \Upsilon}$ is
A
1
B
$\sqrt{3}$
C
$\frac{\sqrt3}{2}$
D
2
36
MCQ (Single Correct Answer)
The value of $\cos1\Upsilon\cos2\Upsilon\cos3\Upsilon ...~\cos179\Upsilon$ is
A
$\frac{1}{\sqrt2}$
B
0
C
1
D
$-1$