# trig

Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function.

Sec^-1(-2)
sec^-1(-sqrt2)
Cos^-1((-sqrt3)/2)
Tan^-1(-sqrt3)

1. 0
2. 0
3. 3
1. To limit the results to only one answer, the range must be limited to a
value between 0 and 180 degrees:
0 < A < 180.

secA = 1/cosA = -2,
cosA = -1/2,
A = 120 deg.

secA = 1/cosA = -sqrt2,
cosA = -1/sqrt2,
A = 135 deg.

cosA = -(sqrt3)/2,
A = 150 deg.

tanA = -sqrt3,
A = -60 deg.,CW = -60 + 180 = 120 deg.

1. 0
2. 0
posted by Henry

## Similar Questions

1. ### trig

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to
2. ### trig

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) Sec^-1(-sqrt2) Tan^-1(-sqrt3) Tan^-1(sqrt3)
3. ### Math PIZZAZZZ

how does a rodeo star get around?? well if you cant give me an answer can you help me. heres the instructions First Simplify the expression below. Then evaluate the expression for the given value or the variable. Find the
4. ### Math

Translate the phrase into an algebraic expression. Five times k A 5k (my answer) B k + 5 C k divided by 5 D 5 - k Evaluate the expression when a = 6 a-24 A - 30 (My answer) B - 18 C 18 D 22 Evaluate the expression when s = 9 and t
5. ### Algebra

Use symbols to write the expression and then evaluate it Thirty six squared divided by six cubed The given expression symbol is? Evaluate it
6. ### algebra

***show work evaluate the expression: 7^-6 (-6)^-9 simplify the expression. write your answer using only positive exponents. 4x^-2*-x -2a^0*a^2
7. ### math

Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions. 8 ln x -(1/3) ln y Choose one answer. a. ln