Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Mathematics Trigonometry Trigonometric Identities

What is the value of cos²θ + cos⁴θ, if sinθ + sin²θ = 1.

1

-1

2

1

3

2

4

More than one of the above

5

None of the above

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