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Ishan Pushkarna

· started a discussion

· 1 Months ago

Option D is misprinted (Question: 351271.0 )

Option D should be sin4θ - cos4θ

Question:

  

Options:
A)

  

B)

  

C)

  

D)

  

Solution:

Ans: (d)


Knowledge Expert

· commented

· 1 Months ago

Dear student,

Given option is correct, sin^2q+cos^2= 1 thus sin^2q-cos^2q is correct answer.

Keep learning keep solving
Best wishes
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Rohit Jha

· commented

· 1 Months ago

(sinx)^4- (cosx)^4=( (sinx)^2-(cosx)^2)((sinx)^2+(cosx)^2) now (sinx)^2+(cosx)^2) =1. so answer D is not misprinted
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