If ΔABC is right angled at C, then the value of cos (A + B) is
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If cos A + cos^{2} A = 1, then sin^{2} A + sin^{4} A is
If cos (α + β) = 0, then sin (α  β) can be reduced to
(1 + tanθ + secθ) (1 + cotθ  cosecθ) is equal to
If cos 9α = sin α and 9α < 90°, then the value of tan 5α is
sin (45° + θ)  cos (45°  θ) is equal to
If sin A = 1/2, then the value of cot A is
Given that sin θ = a/b, then cos θ is equal to
If cosec A  cot A = 4/5, then cosec A =
The value of (tan1° tan2° tan3°... tan89°) is
If sin x + cosec x = 2, then sin^{19}x + cosec^{20} x =
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124 videos457 docs77 tests
