Q. 12 A34.2( 11 Votes )

# The value of {cos

Answer :

Given, cos(40° + θ) - sin(50° - θ)

[cos(90° - θ) = sinθ ]

⇒ cos(90° - (50° - θ)) - sin(50° - θ)

⇒ sin(50° - θ) - sin(50° - θ)

= 0

⇒ Option C is the correct as the value of cos(40° + θ) - sin(50° - θ) is 0

⇒ Option A is incorrect, since it does not match the value

⇒ Option B is incorrect, since it does not match the value

⇒ Option D is incorrect, since it does not match the value

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