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2014-10-03T21:40:30+05:30

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1)If sinФ – cosФ = 0, 0 ≤ Ф ≤ 90° then the value of Ф is :
a) cos Ф b) 45°  c) 90°  d) sin Ф

2) Simplify 
  \frac{sin{x}}{ \sqrt{1-sin^{2}{x} } }

3) In ΔPQR, Q = 90° and if sin R =3/5 write the value of cos P. 
4) 
Write the value of cot² 30° + sec² 45°
5) 
Simplify :
       tan² 60° + 4 cos² 45° + 3 (sec² 30° + cos² 90°)
6) 
If sinФ + sin² Ф = 1 then find the value of cos² Ф + cos⁴Ф
7) Let p = tan Ф + sec Ф then find the value of (p² +1)/p
8) If 4 cot Ф= 3 then write the value of tan Ф + cot Ф
9) Prove that
     cosec⁴Ф – cosec²Ф = cot²Ф+ cot⁴Ф
10) If tan (3x – 15°) = 1 then what is the value of x.
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