Sec2×60°- tan2×60°/sin2×30°+cos2×30°

1.	Sec2×60°- tan2×60°/sin2×30°+cos2×30°
Answer» Trigonometric ratios are the ratios between edges of a right triangle. These ratios are given by the following trigonometric functions of the known angle A, where a, b and c refer to the lengths of the sides in the accompanying figure: TRIGONOMETRY (from Greek trigōnon, "triangle" and metron, "measure"[1]) is a branch of mathematics that studies RELATIONSHIPS between side lengths and ANGLES of triangles. The field emerged in the Hellenistic world during the 3rd century BC from APPLICATIONS of geometry to astronomical studies.[2] The Greeks FOCUSED on the calculation of chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine.

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Trigonometric ratios are the ratios between edges of a right triangle. These ratios are given by the following trigonometric functions of the known angle A, where a, b and c refer to the lengths of the sides in the accompanying figure:

TRIGONOMETRY (from Greek trigōnon, "triangle" and metron, "measure"[1]) is a branch of mathematics that studies RELATIONSHIPS between side lengths and ANGLES of triangles. The field emerged in the Hellenistic world during the 3rd century BC from APPLICATIONS of geometry to astronomical studies.[2] The Greeks FOCUSED on the calculation of chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine.

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