Solve the following equations:(i) sin2 x-cos x=14(ii) 2 cos2 x-5 cos x – InterviewSolution

InterviewSolution

1.	Solve the following equations:(i) sin2 x-cos x=14(ii) 2 cos2 x-5 cos x+2=0(iii) 2 sin2 x+3 cos x+1=0(iv) 4 sin2 x-8 cos x+1=0(v) tan2 x+1-3 tan x-3=0(vi) 3 cos2 x-23 sin x cos x-3 sin2 x=0(vii) cos 4 x=cos 2 x
Answer» Solve the following equations: (i) $\sin^{2} x - \cos x = \frac{1}{4}$ (ii) $2 \cos^{2} x - 5 \cos x + 2 = 0$ (iii) $2 \sin^{2} x + \sqrt{3} \cos x + 1 = 0$ (iv) $4 \sin^{2} x - 8 \cos x + 1 = 0$ (v) $\tan^{2} x + (1 - \sqrt{3}) \tan x - \sqrt{3} = 0$ (vi) $3 \cos^{2} x - 2 \sqrt{3} \sin x \cos x - 3 \sin^{2} x = 0$ (vii) $\cos 4 x = \cos 2 x$

Discussion

No Comment Found

Related InterviewSolutions

The number of ways of choosing 2 cards from a pack of 52 where atleast one face card is choosen
Let P(3,3) be a point on the hyperbola, x2a2−y2b2=1. If the normal to it at P intersects the x−axis at (9,0) and e is its eccentricity, then the ordered pair (a2,e2) is equal to
P speaks truth in 75% cases while Q in 90%.in what % r they likely to contradict each other in stating the same fact .? Do u think B is true Do
If f(x) has the second order derivative at x = c such that f '(c) = 0 and f ''(c) > 0, then c is a point of _______________.
An A.P. consists of 43 terms, if the sum of five middle-most terms is 195, then the sum of the A.P. is
Find the angle between two vectors a and b with magnitudes √3 and 2 respectively, having a.b=√6
If y={x}[x], then 3∫0y dx is equal to,where {.} and [.] are fractional part function and greatest integer function respectively.
The graph of f(x)=−|log(x−3)|+3 will be
1∫0ex⋅x(1+x)2dx is equal to
What is a set and list all formulas of set.