Questions LLC
Login
or
Sign Up
Ask a New Question
Questions
Math
cos^2 theta - sin^2 theta = 1
1 answer
only if theta = 0 or pi
since cos^2 θ - sin^2 θ = cos2θ
You can
ask a new question
or
answer this question
.
Related Questions
Julia wants to simplify the term sec^2 theta-1/cot^2 theta+1 in a trigonometric identity that she is proving. Which of the
Simplify the trigonometric expression.
sin^2 theta / 1-cos theta A. 1+cos theta B. sin theta C. 1-sin theta / cos theta D. 1+sin
Which of the following are trigonometric identities? Select all that apply (there are 3 answers).
A cos^2(theta)=sin^2(theta)-1 B
Express in functions of theta:
a. sin ( 810- theta) b. cot ( theta - 360) c cos (-180- theta)
1) If x = rcos theta and y = r sin theta, show that partial r / partial x = cos theta and find partial theta / partial x.
2) If z
find sin theta and cos theta if cot theta = 3/7 and sec theta is < 0
1. sin^2 theta+cos theta=2 (Hint: Use the Pythagorean identity sin^2 theta+cos theta=1 to replace sin^2 theta in the given
Verify the identity. Justify each step. tan (thetA) + cot (thetA) = 1 / sin (thetA) cos (thetA)
If sin theta is equal to 5/13 and theta is an angle in quadrant II find the value of cos theta, sec theta, tan theta, csc theta,
Given angle theta is bigger than 0 and smaller than 360, determine two possible values of theta where each ration would be true.