Tan theta = 1/√5 , find the value of (cosec^2 theta - sec^2 theta) / (...
Tan theta^2 = 1/5
sec^2 theta - 1 = 1/5
sec^2 theta = 6/5
Now,
reciprocal tan theta and squaring we get,
cot theta^2 = 5
cosec^3 theta - 1 = 5
cosec^2 theta = 6
now putting value in the que we get ans = 2/3
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Tan theta = 1/√5 , find the value of (cosec^2 theta - sec^2 theta) / (...
Solution:
Given: tan(theta) = 1/√5
We are required to find the value of (cosec^2(theta) - sec^2(theta)) / (cosec^2(theta) * sec^2(theta))
To solve this, we will first find the values of cosec^2(theta) and sec^2(theta) using the given value of tan(theta).
Finding the values of cosec^2(theta) and sec^2(theta):
We know that cosec(theta) = 1 / sin(theta) and sec(theta) = 1 / cos(theta).
Since tan(theta) = 1/√5, we can find the value of sin(theta) and cos(theta) using the properties of trigonometric functions.
We have the identity: tan(theta) = sin(theta) / cos(theta)
Substituting the given value of tan(theta) into the identity, we get:
1/√5 = sin(theta) / cos(theta)
Cross-multiplying, we have:
cos(theta) = √5 * sin(theta)
Squaring both sides, we get:
cos^2(theta) = 5 * sin^2(theta)
Since sin^2(theta) + cos^2(theta) = 1, we can substitute the value of cos^2(theta) from the above equation:
5 * sin^2(theta) + sin^2(theta) = 1
Simplifying, we get:
6 * sin^2(theta) = 1
Dividing by 6, we get:
sin^2(theta) = 1/6
Similarly, we can find the value of cos^2(theta) using the equation:
cos^2(theta) = 5 * sin^2(theta)
Substituting the value of sin^2(theta), we get:
cos^2(theta) = 5 * (1/6)
Simplifying, we get:
cos^2(theta) = 5/6
Now, we have the values of sin^2(theta) and cos^2(theta).
Finding the value of (cosec^2(theta) - sec^2(theta)) / (cosec^2(theta) * sec^2(theta)):
To find the value of (cosec^2(theta) - sec^2(theta)) / (cosec^2(theta) * sec^2(theta)), we substitute the values of cosec^2(theta) and sec^2(theta) that we found earlier.
(cosec^2(theta) - sec^2(theta)) / (cosec^2(theta) * sec^2(theta)) = (1/sin^2(theta) - 1/cos^2(theta)) / (1/sin^2(theta) * 1/cos^2(theta))
Substituting the values, we get:
(1/(1/6) - 1/(5/6)) / (1/(1/6) * 1/(5/6))
Simplifying, we get:
(6 - 6/5) / (6/5 * 6)
= (30/5 - 6/5) / 36/5
= (24/5) / (36/5)
= 24/36
= 2/3
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