Questions and answers by

Paul C

Questions (2)

Reduce the following to the sine or cosine of one angle:(i) sin145*cos75 - cos145*sin75 (ii) cos35*cos15 - sin35*sin15 Use the
1. 0 answers
2. 1,150 views
Show that 1-cos2A/Cos^2*A = tan^2*A1-cos2A/Cos^2*A = [Cos^2(A) - Cos(2A)]/Cos^2(A). Substitute: Cos(2A) = 2Cos^2(A) - 1: [1 -
1. 0 answers
2. 722 views