Question
यदि $A = 130^\circ $ तथा $x = \sin A + \cos A,$ तब
$= 2\cos 85^\circ \cos 45^\circ > 0$.
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जिनके लिए $f(3) \geq f(9) \geq f(15) \geq f(21) \geq \ldots . \geq f(99)$ हैं, की संख्या है