Advertisements
Advertisements
प्रश्न
Express each of the following in terms of trigonometric ratios of angles between 0° and 45°: cos84° + cosec69° - cot68°
उत्तर
cos84° + cosec69° - cot68°
= cos(90° - 6°) + cosec(90° - 21°) - cot(90°- 22°)
= sin6° + sec21° - tan22°.
APPEARS IN
संबंधित प्रश्न
If A = 30°, verify that cos2θ = `(1 - tan^2 θ)/(1 + tan^2 θ)` = cos4θ - sin4θ = 2cos2θ - 1 - 2sin2θ
If A = B = 60°, verify that: cos(A - B) = cosA cosB + sinA sinB
Find the value of: `sqrt((1 - sin^2 60°)/(1 + sin^2 60°)` If 3 tan2θ - 1 = 0, find the value
a. cosθ
b. sinθ
In a trapezium ABCD, as shown, AB ‖ DC, AD = DC = BC = 24 cm and ∠A = 30°. Find: length of AB
The perimeter of a rhombus is 100 cm and obtuse angle of it is 120°. Find the lengths of its diagonals.
Evaluate the following: `(sec34°)/("cosec"56°)`
Evaluate the following: `(tan12°)/(cot78°)`
Evaluate the following: cosec 54° - sec 36°
If tan4θ = cot(θ + 20°), find the value of θ if 4θ is an acute angle.
If secθ= cosec30° and θ is an acute angle, find the value of 4 sin2θ - 2 cos2θ.
