4. Find the exact value of each expression without using a calculator. Show your work. cos 70° cos 20° (a) tan 20° (b) 1- cos? 50° – cos? 40°
4. Find the exact value of each expression without using a calculator. Show your work. cos 70° cos 20° (a) tan 20° (b) 1- cos? 50° – cos? 40°
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter77: Machining Compound-angular Surfaces
Section: Chapter Questions
Problem 5A
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can you help me with this please?
![4. Find the exact value of each expression without using a calculator. Show your work.
cos 70°
cos 20°
(a) tan 20°
(b) 1- cos? 50° – cos² 40°](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F67561d1d-787f-457e-a894-bf6df083bcec%2F810780b0-7c4b-4fe4-93da-b6e3eb84adc3%2F1p6mja7_processed.png&w=3840&q=75)
Transcribed Image Text:4. Find the exact value of each expression without using a calculator. Show your work.
cos 70°
cos 20°
(a) tan 20°
(b) 1- cos? 50° – cos² 40°
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