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1.
If sec A + tan A = x, then tan A =
2.
3.
sec A =
4.
If sin x + cosec x = 2, then sin19x + cosec20x =
5.
If cosec A - cot A = -, then cosec A =
6.
tan A =
7.
sin (90 Degree - A) =
8.
If cos 9α = sin a and 9α < 90 Degree, then the value of tan 5α is
9.
The value of sin² 5 Degree + sin² 10 Degree + sin² 15 Degree + __ + sin² 90 Degree is equal to
10.
If cos (α + β) = 0, then sin (α - β) can be reduced to