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Pls solve this ques of trigonometry and write a detailed solution

Pls solve this ques of trigonometry and write a detailed solution

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Grade:10

1 Answers

Arun
25750 Points
5 years ago
Dear Avantika
 
I am writing 
cos x = c
sinx = s
for simplicity
 
2 c^2 – s^2 = 1 / sqrt(2)
 
2 c^2 – 1 + c^2 = 1/ sqrt(2)
 
c^2 = sqrt(2) + 1 / 3sqrt(2)
 
similarily find sinx then put the value in expression.
 
Regards
Arun

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