![Course:MATH110/Archive/2010-2011/003/Groups/Group 11/Basic Skills: Trigonometric Functions - UBC Wiki Course:MATH110/Archive/2010-2011/003/Groups/Group 11/Basic Skills: Trigonometric Functions - UBC Wiki](https://wiki.ubc.ca/images/2/29/UnitCircle2.gif)
Course:MATH110/Archive/2010-2011/003/Groups/Group 11/Basic Skills: Trigonometric Functions - UBC Wiki
![Prove that: i) sin40^(@)cos50^(@)+cos40^(@)sin50^(@)=1 ii) cot (270^(@)-theta)cot(270^(@)+theta)(cot(540^(@)-theta)cot(540^(@)+theta)=1 iii) cospi/8+cos(3pi)/8+cos(5pi)/8+cos(7pi)/8=0 Prove that: i) sin40^(@)cos50^(@)+cos40^(@)sin50^(@)=1 ii) cot (270^(@)-theta)cot(270^(@)+theta)(cot(540^(@)-theta)cot(540^(@)+theta)=1 iii) cospi/8+cos(3pi)/8+cos(5pi)/8+cos(7pi)/8=0](https://d10lpgp6xz60nq.cloudfront.net/question-thumbnail/hi_127115868.png)
Prove that: i) sin40^(@)cos50^(@)+cos40^(@)sin50^(@)=1 ii) cot (270^(@)-theta)cot(270^(@)+theta)(cot(540^(@)-theta)cot(540^(@)+theta)=1 iii) cospi/8+cos(3pi)/8+cos(5pi)/8+cos(7pi)/8=0
![SOLVED: Find the exact value of each trigonometric function without calculator: If the output does not exist; Write DNE: Show your work by drawing circle (or triangles if you leamed it that SOLVED: Find the exact value of each trigonometric function without calculator: If the output does not exist; Write DNE: Show your work by drawing circle (or triangles if you leamed it that](https://cdn.numerade.com/ask_images/76b71655ab1b474888d2f521b8ca1624.jpg)