Advertisements
Advertisements
प्रश्न
Evaluate the following: `(cos34° cos35°)/(sin57° sin56°)`
Advertisements
उत्तर
`(cos34° cos35°)/(sin57° sin56°)`
= `(cos(90° - 56°) cos(90° - 57°))/(sin57° sin56°)`
= `(sin56° sin57°)/(sin57° sin56°)`
= 1.
APPEARS IN
संबंधित प्रश्न
State for any acute angle θ whether tan θ increases or decreases as θ decreases.
Calculate the value of A, if (tan A - 1) (cosec 3A - 1) = 0
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: tan(A - B) = `(tan"A" - tan"B")/(1 + tan"A" tan"B"")`
Find the value of 'x' in each of the following:
Find:
a. BC
b. AD
c. AC
Find the value 'x', if:
The perimeter of a rhombus is 100 cm and obtuse angle of it is 120°. Find the lengths of its diagonals.
Evaluate the following: sin22° cos44° - sin46° cos68°
Evaluate the following: `(5cot5° cot15° cot25° cot35° cot45°)/(7tan45° tan55° tan65° tan75° tan85°) + (2"cosec"12° "cosec"24° cos78° cos66°)/(7sin14° sin23° sec76° sec67°)`
