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Trigonometric Ratios of Multiples of an Angle

How to find t...

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How to find the minimum value of (sinex+cosx)

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Q. The minimum value of

sin x + cos x

Q. Find the minimum value of

∣ ∣ ∣ s i n x + c o s x + \frac{c o s x - s i n x}{c o s^{4} x - s i n^{4} x} ∣ ∣ ∣

Q. Find the maximum and minimum of

sin x + cos x

y = \sqrt{cos x + \sqrt{cos x + \sqrt{cos x + \dots to \infty}}}

\frac{d y}{d x} = \frac{p sin x}{q + r y}

p, q, r \in N

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f (x) = (1 + sin x) (1 + cos x), \forall x ϵ R .

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