Trigonometric Ratios of Complementary Angles

If the sum of two angles is 90^\circ then, it is called Complementary Angles. In a right-angled triangle, one angle is90^\circ , so the sum of the other two angles is also 90^\circ or they are complementary the trigonometric ratios of the complementary angles will be –

Sin (90^\circ  - A) = cos A,

cos (90^\circ  - A) = sin A,

Tan (90^\circ  - A) = cot A,

Cot (90^\circ  - A) = tan A,

Sec (90^\circ  - A)= cosec A,

Cosec (90^\circ  - A) = sec A

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