If sec theta = x + 1/4x , prove that : Sec theta + tan theta = 2x or 1...
Proof:
Let's start by using the given information:
sec(theta) = x^(1/4x)
We know that sec(theta) is the reciprocal of cos(theta), so we can rewrite the equation as:
1/cos(theta) = x^(1/4x)
Step 1: Expressing cos(theta) in terms of sec(theta)
To solve for cos(theta), we can take the reciprocal of both sides of the equation:
cos(theta) = 1 / (x^(1/4x))
Step 2: Expressing tan(theta) in terms of sin(theta) and cos(theta)
Next, let's express tan(theta) in terms of sin(theta) and cos(theta). We know that:
tan(theta) = sin(theta) / cos(theta)
Step 3: Expressing sin(theta) in terms of cos(theta)
To express sin(theta) in terms of cos(theta), we can use the Pythagorean identity:
sin^2(theta) + cos^2(theta) = 1
Rearranging the equation, we get:
sin^2(theta) = 1 - cos^2(theta)
Taking the square root of both sides, we have:
sin(theta) = √(1 - cos^2(theta))
Step 4: Substituting the expressions for sin(theta) and cos(theta) into the equation for tan(theta)
Substituting the expressions for sin(theta) and cos(theta) into the equation for tan(theta), we get:
tan(theta) = √(1 - cos^2(theta)) / cos(theta)
Step 5: Substituting the expression for cos(theta) from Step 1 into the equation for tan(theta)
Now, we can substitute the expression for cos(theta) from Step 1 into the equation for tan(theta):
tan(theta) = √(1 - (1 / (x^(1/4x)))^2) / (1 / (x^(1/4x)))
Simplifying the expression, we have:
tan(theta) = √(1 - 1 / x^(1/2)) / (1 / x^(1/4x))
Step 6: Simplifying the expression for tan(theta)
To simplify the expression further, we can rationalize the denominator:
tan(theta) = √(x^(1/2) - 1) * (x^(1/4x)) / 1
Simplifying the expression, we get:
tan(theta) = x^(1/4x) * √(x^(1/2) - 1)
Step 7: Expressing sec(theta) * tan(theta) in terms of x
Finally, we can substitute the expression for sec(theta) from the given information:
sec(theta) * tan(theta) = x * (x^(1/4x) * √(x^(1/2) - 1))
Simplifying the expression further, we have:
sec(theta) * tan(theta) = x^(5/4x) * √(x^(1/2) - 1)
Therefore, we have shown that sec(theta) * tan(theta) is equal to x^(5/4x) * √(x^(1/2) -
If sec theta = x + 1/4x , prove that : Sec theta + tan theta = 2x or 1...
Sec theta = x+1/4x Sec²theta = (x+1/4x)²1+tan²theta = x²+1/16x²+1/2 tan²theta = x²+1/16x²+1/2-1tan²theta = x²+1/16x²-1/2tan theta = +-(x-1/4x)when tan theta = +(x-1/4x)then, sec theta+tan theta = x+1/4x+x-1/4x => 2xwhen tha theta = -(x-1/4x)then, sec theta +tan theta = x+1/4x-(x-1/4x) =x+1/4x-x+1/4x=> 1/2x So, sec theta +tan theta = 2x or 1/2x
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