यदि (tan x + sin x) = m तथा (tan x - sin x) = n हो तो (m² - n² ) = ?
(a) √mn
(b) 2√mn
(c) 4√mn
(d) 4mn
Adv.
यदि (a cot θ + b cosec θ) = x तथा ( b cot θ + a cosec θ) = y हो तो x² - y² = ?
(a) a² + b²
(b) a² - b²
(c) b² - a²
(d) (a-b)²
यदि x = a sec θ तथा y = b tanθ हो तो (x²/a² - y² / b² ) का मान होगा?
(a) 1
(b) - 1
(c) 2
(d) -2
यदि a cos θ + b sin θ = 8 तथा a sin θ - b cos θ = 5 हो तो (a² + b²) = ?
(a) 13
(b) 40
(c) 89
(d) 39
यदि (cos x + sin x ) = √2 cos x हो तो (cos x - sin x) = ?
(a) -√2 cos x
(b) √2 sin x
(c) 1/√2 sec x
(d) 1/√2 cosec x
यदि cos θ = 0.6 हो तो (5 sin θ - 3 tan θ) = ?
(a) 2
(b) √2
(c) 0
(d) 1/2
यदि secA = 25/7 हो तो sinA = ?
(a) 7/24
(b) 24/7
(c) 24/25
(d) 25/24
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