Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

cos(π + θ) =

1
cos θ
2
-cos θ
3
sin θ
4
उपर्युक्त में एक से अधिक
5
उपर्युक्त में से कोई नहीं
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