Sin^2(77)°- Cos ^2(13)°
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Answer:
Sin^2(77)° - Cos^2(13)°
= Sin^2(90° - 13°) - Cos^2(13)°
= Cos^2(13)° - Cos^2(13)°
= 0 [:- Sin(90° - theta) = Sin theta
Step-by-step explanation:
Sorry Bhai theta type karna nahi janta. Isliye theta likha hu.