JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

1 Medium

1 of 1

Application +4 | -1

a=\cos \phi \cos \psi+\sin \phi \sin \psi \cos \delta

b=\cos \phi \sin \psi-\sin \phi \cos \psi \cos \delta

and

c=\sin \phi \sin \delta

. Then

a^2+b^2+c^2=

View answer and explanation

Correct option: C

Option C (1) is correct because by expanding the expression a² + b² + c² and using trigonometric identities, it simplifies to 1.

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