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priyanka

· started a discussion

· 1 Months ago

question 208342 (Question: 208342.0 )

your solution is wrong
theta 1+theta2=210.........(1)
theta1-theta2=30......(2)
in dono equation se question solve hoga

Question:
If cot (\(\theta\)1 + \(\theta\)2) = \(\sqrt{3}\) and cosec (\(\theta\)1 – \(\theta\)2) = \(\cfrac{2}{\sqrt{3}}\), then the value of (cos 2\(\theta\)1 + cot 3\(\theta\)2) is –
Options:
A) 1
B) 2
C) 0
D) -1
Solution:
Ans: (d)


Shakshi Joshi

· commented

· 1 Months ago

Solution is correct... They have compared the values to cot 30 and cosec 60 respectively... That's how they have written theta1+theta2=30 and theta1-theta2=60
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