How is it that sin90

How is it that sin90 is negative?
1. 1 answer
2. asked by Gene
3. 460 views
Cos180* - Sin90* + Cot45* - Csc30* - Sec240* - Tan315*How do I do this?
1. 2 answers
2. asked by Victoria
3. 466 views
1/tan60;sin90;tanto......forma a sequence calculate the fourth term
1. 1 answer
2. 64 views
How would I do this:-cos(90-x) I know you would use the compound angle formula and I know how to do it but when you have -cos do
1. 1 answer
2. asked by Mandy
3. 484 views
Given the following unit circle, rotate green dot to the appropriate angle and then find the exact value of the function.sine,
1. 1 answer
2. 125 views
1/tan60';sin90',tan60';...form a sequence. Calculate the fourth term.
1. 3 answers
2. asked by jay
3. 720 views
Evaluate (exact answers):a) sin^-1(cos30) Need help. What do I do? b) sin[(cos^-1((sqrt2)/(2)))+[(sin^-1((sqrt2)/(2)))] =
1. 0 answers
2. asked by Anonymous
3. 594 views
Glycerine has an index of refraction of 1.47. What is the critical angle for a light ray traveling from:a)Glycerin into air
1. 3 answers
2. asked by Kayla
3. 3,328 views
Given that sin0°=cos90°, sin30°=cos60° , sin45°=cos45° , and sin90°=cos0° , what is sin60° equal to?(1 point) Responses
1. 1 answer
2. 77 views
Given that sin0°=cos90°, sin30°=cos60° , sin45°=cos45° , and sin90°=cos0° , what is sin60° equal to?(1 point) Responses
1. 1 answer
2. 146 views