(d) Concept of trigonometric ratios ofcomplementary angles and their d

1.	(d) Concept of trigonometric ratios ofcomplementary angles and their directapplication:sin A = cos (90°- A), cos A = sin (90° - A)tan A=cot (90° - A), cotA= tan (90° - A)sec A = cosec (90°-A),cosec A = sec (90° - A)
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(d) Concept of trigonometric ratios ofcomplementary angles and their directapplication:sin A = cos (90°- A), cos A = sin (90° - A)tan A=cot (90° - A), cotA= tan (90° - A)sec A = cosec (90°-A),cosec A = sec (90° - A)

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(d) Concept of trigonometric ratios ofcomplementary angles and their directapplication:sin A = cos (90°- A), cos A = sin (90° - A)tan A=cot (90° - A), cotA= tan (90° - A)sec A = cosec (90°-A),cosec A = sec (90° - A)​

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(d) Concept of trigonometric ratios ofcomplementary angles and their directapplication:sin A = cos (90°- A), cos A = sin (90° - A)tan A=cot (90° - A), cotA= tan (90° - A)sec A = cosec (90°-A),cosec A = sec (90° - A)