(A) Evaluate 2 \sec ^2 \theta+3 {\cosec}^2 \theta-2 \sin \theta \cos \theta \text{ if } \theta=45^{\circ} \text{. } OR (B) If \sin \theta-\cos \theta=0, then find the value of \sin ^4 \theta+\cos ^4 \theta.

CBSE Class 10 Math 2023 Delhi Set-3 Solved Paper - Question 7

SECTION - B
Section-B consists of Very Short Answer (VSA) type questions of 2 marks each.

Question : 7 of 11

Marks: +1, -0

(A) Evaluate

2 \ sec ^2 θ+3 {\cosec}^2 θ-2 sin \;θ \cos θ \;\text " if "\; θ=45^{∘} \;\text ". "\;

OR
(B) If

sin \;θ-\cos θ=0

, then find the value of

sin \;^4 θ+\cos ^4 θ

Solution:

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