If cos 65° + cos 55° = cos θ, find θ in radians
If cos 65° + cos 55° = cos θ, find θ in radians
A). 0.087
B). 0.765
C). 1.213
D). 1.421
1 answers
Other Questions
1. The angle of elevation of the top of a house from point P is 15°. Point P is on the ground level. Point P is at a distance of 100 meter from the house. Find height of the house.
2. The expression $\frac{tan57^{0}+ cot37^{0}}{tan33^{0} + cot53^{0}}$ is equal to
3. If $tan\theta + cot\theta$ = 2, then the value of $tan^{100}\theta + cot^{100}\theta$ is
4. The angle of elevation of an aeroplane from a point on the ground is 60°. After flying for 30 seconds, the angle of elevation changes to 30°. If the aeroplane is flying at a height of 4500 m, then what is the speed (in m/s) of aeroplane?
5. The sides of a triangle are 195, 157 and 210, respectively. What is the area of the triangle?
6. A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is
7. If tan θ - cot θ = 0, find the value of √6(4sin θ + 2cos θ),
8. Determine the spherical excess of the spherical triangle ABC given a = 56°, b = 65°, and c = 78°.
9. If the value of θ = 30°, then value of tan2 θ + cot2θ
10. The distance between two places A and B is 60 km. Two cars start at the same time from A and B, travelling at a speed of 35km/h and 25km/h,
respectively. If the cars run in the same direction, then they will meet after ( in hours)
