410,803 views
43 votes
43 votes
Is square root 1-cos^2theta=-sintheta true? if so, in which quadrants does angle theta terminate?

Is square root 1-cos^2theta=-sintheta true? if so, in which quadrants does angle theta-example-1
User Glennreyes
by
2.7k points

1 Answer

17 votes
17 votes

Yes it is true:

(1 - cos^2 x) = sin^2 x Sqr.(1 - cos^2 x) = sin x and (-sinx) True, since sin x negative. Also, x terminates in quadrant 3 and 4. Hope this is helpful

User MethodManX
by
2.8k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.