evaluate the following expressions:
tan(sec^-1(5/3))
tan(sec^-1(25/7))
cot(csc^-1(5/3))
i know the answers.. i jus don't know how to solve them =( PLEASE help me
I assume your sec^-1 notation denot4es the arcsecant function, etc.
sec^-1 (5/3) = cos^-1 (3/5). Think of a 3,4,5 right triangle. The tangent of the angle is 4/3.
sec^-1 (25/7) = cos^-1 (7/25)
Think of a 7,25,24 right triangle. The hypotenuse is 25 and the adjacent side is 7. The tangent is 24/7
csc^(5/3) = sin^-1 (3/5). Think of a 3,4,5 right triangle again. The hypotenuse is 5 and the opposite side of the angle in question is 3. The cotangent is (adjacent side)/(opposite side) = 4/3.
So the answers are:
tan(sec^-1(5/3)) = 4/3
tan(sec^-1(25/7)) = 24/7
cot(csc^-1(5/3)) = 4/3
To evaluate the expressions:
1. tan(sec^-1(5/3)):
First, find the value of sec^-1(5/3) by taking the inverse cosine (cos^-1) of 3/5. This gives you the angle whose cosine is 3/5.
Next, take the tangent of that angle to get the final result.
So, tan(sec^-1(5/3)) = tan(cos^-1(3/5))
2. tan(sec^-1(25/7)):
Similarly, find the value of sec^-1(25/7) by taking the inverse cosine (cos^-1) of 7/25.
Then, take the tangent of that angle to get the final result.
So, tan(sec^-1(25/7)) = tan(cos^-1(7/25))
3. cot(csc^-1(5/3)):
First, find the value of csc^-1(5/3) by taking the inverse sine (sin^-1) of 3/5. This gives you the angle whose sine is 3/5.
Then, take the cotangent of that angle to get the final result.
So, cot(csc^-1(5/3)) = cot(sin^-1(3/5))
Note: In order to get the exact values, you can use a scientific calculator or an online calculator that supports trigonometric functions and inverse trigonometric functions. Simply input the expressions and evaluate them to get the results.
To evaluate the expressions given:
1. tan(sec^-1(5/3)):
- Rewrite sec^-1(5/3) as cos^-1(3/5).
- Think of a 3, 4, 5 right triangle, where the cosine of the angle is adjacent side/hypotenuse, which is equal to 3/5.
- To find the tangent, divide the opposite side by the adjacent side, giving us 4/3.
2. tan(sec^-1(25/7)):
- Rewrite sec^-1(25/7) as cos^-1(7/25).
- Consider a right triangle with sides 7, 24, and 25.
- The cosine of the angle is adjacent side/hypotenuse, or 7/25.
- Divide the opposite side by the adjacent side to find the tangent, which is 24/7.
3. cot(csc^-1(5/3)):
- Rewrite csc^-1(5/3) as sin^-1(3/5).
- Imagine a right triangle with sides 3, 4, and 5.
- The sine of the angle is opposite side/hypotenuse, meaning it is 3/5.
- Calculate the cotangent by dividing the adjacent side by the opposite side, resulting in 4/3.
So, the evaluations are:
1. tan(sec^-1(5/3)) = 4/3.
2. tan(sec^-1(25/7)) = 24/7.
3. cot(csc^-1(5/3)) = 4/3.