trigonometry

Related Questions

• The solution of the equation $4{{\cos }^{2}}x+6$${{\sin }^{2}}x=5$

  ---

• A vertical pole (more than 100 m high) consists of two portions, the lower being one-third of the whole. If the upper portion subtends an angle ${{\tan }^{-1}}\frac{1}{2}$ at a point in a horizontal plane through the foot of the pole and distance 40 ft from it, then the height of the pole is

  ---

• If in a triangle $ABC$ , $2\cos A=\sin B\,\text{cosec}\,C,$ then

  ---

• The sides of a triangle are 4, 5 and 6cm. The area of the triangle is equal to

  ---

• If $\sec x\cos 5x+1=0$, where $0<x<2\pi $, then $x =$

  ---