Math- Trig

1. Determine the exact value of cos^-1 (pi/2). Give number and explanaton.

2. Determine the exact value of tan^-1(sq. root 3). with explanation.

3. Determine exact value of cos(cos^-1(19 pi)). with explanation.

4. Determine the exact value of sin(sin^-1(20 pi)). with explantation.

5.determine exact value of cos^-1(sq root 2/2). with explanation.

6.Determine the exact value of cos(cos^-1(-sq root 2/2)). with explanation.

7.Determine the exact value of sin^-1(-1) with explanation.

8. Determine the exact value of cos^-1(0).with explanation.

9. Prove the idenity: cos^4(x)-sin^4(x)=1-2sin^2(x).with explanation.

10.Give a specific value of theta such that cos(theta)= -sq. root(1-sin^2(theta)) and determine the value of both sides to verify your claim. with explanation.

11.Prove the idenity: (tan^2(theta) OVER Sec(theta) +1 = sec(theta) -1. with explanation.

12. Prove the Pythagorean idenity (so don't assume it for this problem) sin^2 (theta) + cos^2 (theta)= 1 by using the sum/difference formulas for sine/cosine (pick what is appropraite). with explanation.

13. Use the appropriate sum/difference formulas to prove the idenity: tan(theta + 45°)= (1+tan(theta)) OVER (1-tan(theta). with explanation.

14. Use the appropriate sum/difference formulas to find the ecaxt value of cos(105°). with explanation.

15. Use the addition/subtraction formulas for tangent to prove that pi OVER 4= tan^-1(3/2) + tan^-1 (1/5). with explanation.

16. Prove the idenity: sin(theta) + cos(theta)=(Sq root 2) sin(theta + 45°). with explanation.

asked by Crystal
  1. Woahh Crystal, that is now how this site works
    We do not do your assignment for you.

    Pick one problem, tell us what particular problem you have with it, and what you have done so far, and I am sure somebody will guide you further.

    posted by Reiny
  2. sorry, wasn't thinking- i shouldve put what i was wanting help with- i mainly just want help figureing out how to put it in my calculator, and im not sure what type of explanation to give.

    posted by Anonymous
  3. not knowing which calculator yu have, it's hard to say.

    Any explanation given here will probably be less detailed than what you will find in your user's manual for the calculator. RTFM.

    posted by Steve
  4. I have the TI-84 Plus Silver edition

    posted by Crystal

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Determine the exact value of cos^-1 (pi/2). Give a number and an explanaton. ok so I have a graphing calculator, so i was just wanting to make sure that we plug it in as is? or do we have to change it to put it in the calculator.
  2. advanced functions

    Angle a lies in the second quadrant and sina=7/25. a) Determine an exact value for cos 2a b) Determine an exact value for sin 2a
  3. math

    determine the exact value of (cot pi/3) + (csc pi/3) / (cos pi/4). how is this calculated? i mean the steps to get the exact value?
  4. MATH

    1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL STEPS) sin 2x - sin x = 0 2.) GIVEN: sin u = 3/5, 0 < u < ï/2 Find the exact values of: sin 2u, cos 2u and tan 2u using the double-angle formulas.
  5. math

    Determine exact value of cos(cos^-1(19 pi)). is this the cos (a+b)= cos a cos b- sina sin b? or is it something different. When plugging it in the calculator, do we enter it with cos and then the (cos^-1(19 pi)).
  6. advanced functions

    Angles x and y are located in the first quadrant such that sinx=3/5 and cosy=5/13. a) Determine an exact value for cosx. b) Determine an exact value for siny.
  7. math

    Angles x and y are located in the first quadrant such that sinx=3/5 and cosy=5/13. a) Determine an exact value for cosx b) Determine an exact value for siny
  8. trig

    give exact value of cos 75 degrees. give exact value sin 15 degrees. give exact value sin 225 degrees. You will have to use the addition relations here. Notice 75 is 30 +45, 15 is 45-30, and 225 is 180 + 45. I will be happy to
  9. math

    Determine the values of sin, cos, tan, csc, sec and cot at (-3, -3) on the terminal arm of an angle in standard position 2. If cos θ = 2/3 and 270° < θ < 360° then determine the exact value of 1/cot
  10. Math

    ​Angles A and B are located in the first quadrant. If sin a =5/13 and cos b= 3/5 , determine the exact value of cos (a+b) .

More Similar Questions