Which of the following are true? A. sin? + cos2 := 2 B. sin? 20 + cos? 20 = 2 C. sec2 - tan? = 1 D. csc2 20 - cot2 20 1 OB and D O C and D O A and B O A and C

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter76: Drilling And Boring Compound-angular Holes
Section: Chapter Questions
Problem 5A
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Which of the following are true?
A. sin + cos?
2
B. sin? 20 + cos? 20 = 2
C. sec2 - tan? = 1
D. csc2 20 – cot2 20 = 1
O B and D
O C and D
O A and B
O A and C
Transcribed Image Text:Which of the following are true? A. sin + cos? 2 B. sin? 20 + cos? 20 = 2 C. sec2 - tan? = 1 D. csc2 20 – cot2 20 = 1 O B and D O C and D O A and B O A and C
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