Advertisements
Advertisements
प्रश्न
The value of `(1 - tan^2 45^circ)/(1 + tan^2 45^circ)` is
विकल्प
2
1
0
`1/2`
उत्तर
0
Explanation;
Hint:
`(1 - tan^2 45^circ)/(1 + tan^2 45^circ) = (1 - 1)/(1 + 1)`
= `0/2`
= 0
APPEARS IN
संबंधित प्रश्न
Evaluate the following
sec 50º sin 40° + cos 40º cosec 50º
Prove the following :
`(cos(90^@ - theta) sec(90^@ - theta)tan theta)/(cosec(90^@ - theta) sin(90^@ - theta) cot (90^@ - theta)) + tan (90^@ - theta)/cot theta = 2`
If sin x = cos y; write the relation between x and y, if both the angles x and y are acute.
Given A = 60° and B = 30°,
prove that : cos (A - B) = cos A cos B + sin A sin B
If A = B = 45° ,
show that:
cos (A + B) = cos A cos B - sin A sin B
If A = 30°;
show that:
(sinA - cosA)2 = 1 - sin2A
If A = 30° and B = 60°, verify that: sin (A + B) = sin A cos B + cos A sin B
Find the value of the following:
(sin 90° + cos 60° + cos 45°) × (sin 30° + cos 0° – cos 45°)
The value of cos1°. cos2°. cos3°. cos4°....................... cos90° is ______.
Find the value of x if `2 "cosec"^2 30 + x sin^2 60 - 3/4 tan^2 30` = 10
