Wednesday
April 23, 2014

Homework Help: trig

Posted by Paul C on Sunday, November 26, 2006 at 6:08pm.

Show that 1-cos2A/Cos^2*A = tan^2*A

1-cos2A/Cos^2*A =

[Cos^2(A) - Cos(2A)]/Cos^2(A).

Substitute:

Cos(2A) = 2Cos^2(A) - 1:

[1 - Cos^2(A)]/Cos^2(A)=

Sin^2(A)/Cos^2(A) = tan^2(A)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

precalculus - For each of the following determine whether or not it is an ...
Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
Math - Solving Trig Equations - What am I doing wrong? Equation: sin2x = 2cos2x ...
algebra - Can someone please help me do this problem? That would be great! ...
Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...
trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
Math - Calculus - The identity below is significant because it relates 3 ...
TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
tigonometry - expres the following as sums and differences of sines or cosines ...

Search
Members