search
Log In

Recent questions tagged trignometry

1 vote
1 answer
1
$(\cos 100^\circ + i \sin 100^\circ)(\cos 0^\circ + i \sin 110^\circ)$ is equal to $\frac{1}{2}(\sqrt3 – i)$ $\frac{1}{2}(-\sqrt3 – i)$ $\frac{1}{2}(-\sqrt3 +i)$ $\frac{1}{2}(\sqrt3 + i)$
asked May 6, 2019 in Others Sayan Bose 204 views
1 vote
1 answer
2
For $0 \leq x < 2 \pi$, the number of solutions of the equation $\sin^2x + 2 \cos^2x + 3\sin x \cos x = 0$ is $1$ $2$ $3$ $4$
asked May 6, 2019 in Others Sayan Bose 271 views
1 vote
1 answer
3
The value of $\frac{1}{2\sin10^\circ}$ – $2\sin70^\circ$ is $-1/2$ $-1$ $1/2$ $1$
asked May 6, 2019 in Others Sayan Bose 185 views
To see more, click for the full list of questions or popular tags.
...