Use Addition formula to find the exact value of cos (a + B). if tan a= 3 (a in quadrant I) and csc B=, (B in quadrant II). %3D 3
Use Addition formula to find the exact value of cos (a + B). if tan a= 3 (a in quadrant I) and csc B=, (B in quadrant II). %3D 3
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Transcribed Image Text:(a) Use Addition formula to find the exact value of cos (a + 8).
2
(a in quadrant III) and csc B
(B in quadrant II).
if tan a =
3'
(b) Find the quadrant in which the angle (a + B) lies if csc (a + B)<0.
Hint: Use your answer for part (a).
Select one:
O Quadrant/
Quadrant II
O Quadrant II
Quadrant IV
ENG
a
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