(ii) Hence, without using a calculator, find the value of tan(22.5°

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter1: The Six Trigonometric Functions
Section1.5: More On Identities
Problem 97PS
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part i is okay for me. need help on part ii

(1)
Prove the identity sin 2x- tan x cos 2x = tan x.
(ii) Hence, without using a calculator, find the value of tan(22.5°)
Transcribed Image Text:(1) Prove the identity sin 2x- tan x cos 2x = tan x. (ii) Hence, without using a calculator, find the value of tan(22.5°)
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