If ΔABC is right angled at C, then the value of cos (A + B) is
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If cos A + cos2 A = 1, then sin2 A + sin4 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 sin19x + cosec20 x =
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124 videos|457 docs|77 tests
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