How do you simplify the expression #1-cos^2theta#?
1 Answer
Aug 26, 2016
Explanation:
Using the
#color(blue)"trigonometric identity"#
#color(red)(|bar(ul(color(white)(a/a)color(black)(sin^2theta+cos^2theta=1)color(white)(a/a)|)))# subtract
#cos^2theta# from both sides
#rArrsin^2theta+cancel(cos^2theta)-cancel(cos^2theta)=1-cos^2theta#
#rArr1-cos^2theta=sin^2theta#
