Question

Worksheet: Section 8.1 & 8.2 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Find the exact value of the expression. 1) tan-1-1) 1) 2) sin-1 (-0,5) 2 3) cos 3) Use a calculator to find the value of the expression rounded to two decimal places. 4) tan-1 (0.8) Find the exact value of the expression. Do not use a calculator. 3 5) Cos 5) 5 Find the inverse function f-1 of the function f. 6) f(x) 5 cos x+8 6) Find the exact value of the expression. 7) 7) coetan 4-9) (4) 8) cot sin Use a calculator to find the value of the expression in radian measure rounded to two decimal places. 9) sec 9)

please show calculations.

Answer 1

1. -π/4

2. -π/6

3. 5π/6

4. 0.67

5. 3π/5

6. y = 5cosx + 8

y - 8 = 5cosx

(y - 8)/5 = cosx

x =cos^{​​​​-1}​​((y-8)/5)

f^{​​​​​​-1}​(x) = cos^{​​​​-1} ((x - 8)/5)

7. 0.28734

8. -2.291

9. 2.18