Advertisements
Advertisements
प्रश्न
Solve for x : cos2 30° + cos2 x = 1
Advertisements
उत्तर
cos230° + cos2 x = 1
cos2 x = 1 – cos2 30°
cos2 x = 1 – `(3)/(4)`
cos x = `(1)/(2)`
x = 60°
संबंधित प्रश्न
Find the magnitude of angle A, if 2 cos2 A - 3 cos A + 1 = 0
Find the value of 'A', if 2 sin 2A = 1
Find the value of 'A', if (1 - cosec A)(2 - sec A) = 0
Solve for 'θ': cot2(θ - 5)° = 3
Find:
a. BC
b. AD
c. AC
Evaluate the following: `(tan42°)/(cot48°) + (cos33°)/(sin57°)`
Evaluate the following: sin(35° + θ) - cos(55° - θ) - tan(42° + θ) + cot(48° - θ)
Evaluate the following: `(5cot5° cot15° cot25° cot35° cot45°)/(7tan45° tan55° tan65° tan75° tan85°) + (2"cosec"12° "cosec"24° cos78° cos66°)/(7sin14° sin23° sec76° sec67°)`
If tan4θ = cot(θ + 20°), find the value of θ if 4θ is an acute angle.
If A, B and C are interior angles of ΔABC, prove that sin`(("A" + "B")/2) = cos "C"/(2)`
