trigonometry

Related Questions

• A vertical pole consists of two parts, the lower part being one third of the whole. At a point in the horizontal plane through the base of the pole and distance 20 meters from it, the upper part of the pole subtends an angle whose tangent is $\frac{1}{2}$. The possible heights of the pole are

  ---

• In a $\Delta ABC$ , $a,\ b,\ A$ are given and ${{c}_{1}},\ {{c}_{2}}$ are two values of the third side c. The sum of the areas of two triangles with sides $a,\ b,\ {{c}_{1}}$ and $a,b,\ {{c}_{2}}$ is

  ---

• The general solution of $\sin x-\cos x=\sqrt{2}$, for any integer n is

  ---

• If $\sin (\alpha -\beta )=\frac{1}{2}$and $\cos (\alpha +\beta )=\frac{1}{2},$where $\alpha $ and $\beta $ are positive acute angles, then

  ---

• If $\tan \alpha $ equals the integral solution of the inequality $4{{x}^{2}}-16x+15<0$ and $\cos \beta $ equals to the slope of the bisector of first quadrant, then $\sin (\alpha +\beta )\sin (\alpha -\beta )$is equal to

  ---