Without using trigonometric tables, find the value of the following expression:sec 90° θ cosec θ tan 90° θ cot θ + cos2 25° + cos2 65° 3 tan 27° tan 63°

Without using trigonometric tables, find the value of the following expression:sec 90° θ cosec θ tan 90° θ cot θ + cos2 25° + cos2 65° 3 tan 27° tan 63°
Without using trigonometric tables- find the value of the following expression-sec 90- - cosec - - tan 90- - cot - - cos2 25- - cos2 65- 3 tan 27- tan 63

17. Without using trigonometric table, evaluate ( frac { tan 20 ^ { circ } } { cot 70 ^ { circ } } frac { cos 50 ^ { circ } + } { operatorname { Sec } 40 ^ { circ } } frac { sin ^ { 2 } 20 + sin ^ { 2 } 70 } { sin theta cos ( 90 - theta ) +

Evaluate without using trigonometric table: displaystyle frac{{cos e{c^2}left( {{{90}^ circ } - theta } right) - {{tan }^2}theta }}{{4left( {{{cos }^2}{{48}^ circ + }{{cos }^2}{{42}^ circ }} right)}} - frac{{2{{tan }^2}{{30}^ circ }{{

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Value of sin, cos, tan, cot at 0, 30, 45, 60, 90 - Trigonometry Table

sec(90-theta) cosec theta - tan(90- theta) cot theta + cos² 25 + cos²65 / 3tan 27 tan63

16. Without using trigonometric tables, the value of the following expression: sec (90°- 0) cosec 0 -tan (90° -) coto + cos2 25° + cosa 65° 3 tan 27° tan 639