Trigonometric Identities

Michigan State University - Diagnostic Exam

Which of the following is equal to $tan θ sec θ$ ?

a) $---sin-θ--- 1 - sin2θ$ b) $-1--- sinθ - sin θ$ c) $sin θ$

d) $∘ ---------- 1 - sin2θ$ e) $1 ----- sinθ$

Solution:

sin-θ--1--- tan θ sec θ = cosθ cosθ sinθ = ---2-- cos θ = --sinθ---- 1 - sin2 θ

Diagnostic:

If you miss this question please review simplifying trigonometric expressions.

July 15, 2008