If cos4 B - sin4 B =
A man observes the top of a tower at an angle of elevation of 30°. He walks 100 meters closer to the tower, and the angle of elevation becomes 60°. If...
What is the value of (1 - sin A)/(1 + Sin A) given that tan A = 5/12 and 0° ≤ A ≤ 90°.
- If sin (a + b) = (√3/2) and cos (a – b) = (√3/2), then find sin a.
The angle of depression of vertex of a regular hexagon lying in a horizontal plane, form the top of a tower of height 135 m located at the centre of the...
Simplify the following trigonometric expression:
10 cos 71° sec 19° − 4 cot 62° tan 28°If A lies in the first quadrant and 6 tan A = 5, then the value of 8 sin A−4 cos A / cos A+2 sin A is :
If sec x + tan x = 11 then find secx?
Solve for x in the interval [0, 2π]: 2 sin²x + 3 sinx - 2 = 0.
- If sin(A + B) = sinAcosB + cosAsinB, then the value of sin75° is