व्यंजक 1 − cos²θ किसके बराबर है?
A1
Bsin²θ
Ccos²θ
Dtan²θ
Answer & Solution
Correct answer: B. sin²θ
सर्वसमिका sin²θ + cos²θ = 1 का पक्षांतर करने पर 1 − cos²θ = sin²θ प्राप्त होता है।
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