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sonu

· started a discussion

· 1 Months ago

wrong answer (Question: 189937.0 )

answer is 2sin(THETA)

Question:
The value of sin (45º + \(\theta\)) – (cos 45º– \(\theta\)) is equal to –
Options:
A) 2 cos \(\theta\) 
B) 2 sin \(\theta\)
C) 1
D) 0
Solution:
Ans: (d)

sin (45º+ \(\theta\)) – cos (45º– \(\theta\)) 

= sin (45º+ \(\theta\)) – cos (90º– (45º+ \(\theta\))) 

= sin (45º+ \(\theta\)) – sin (45º+\(\theta\))

= 0 

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