= tan θ

True

LHS: √((1 – cos² θ) sec² θ )

= RHS

The value of the expression (sin 80⁰-cos 80⁰) is negative.

= tan θ

If cos A+cos²A=1, then sin²A + sin⁴A=1

Questions · 120

8. Introduction to Trigonometry and Its Applications

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