if square root of sinx +cosx =0, then sin x=? Can u pls give me the solution as soon as possible?
DEEPIKA SRI KUMARAPPAN , 7 Years ago
Grade 11
Trigonometry> if square root of sinx +cosx =0, then sin...
2 AnswersHarshal Gupta
Last Activity: 7 Years ago
X = 3π/4You see, sin3π/4 + cos3π/4 = 1/√2 + -1/√2I guess you don`t remember all values, right?Anyways, try recalling most of them while practicing, it really helps
Soumendu Majumdar
Last Activity: 6 Years ago
root(sin x) + cos x = 0
implies sin x = cos^2 x …........by squaring both sides
implies sin^2 x + sin x – 1 = 0.........by using cos^2 x = 1 – sin^2 x
Now using shreedharacharya formula to find roots of a quadratic equation
you get
sin x = ( -1 ± root(5) )/2
now sin x= (-1 – root(5) )/2 is less than – 1 but sin x always lies within – 1 and 1
so sin x = ( root(5) – 1 )/2
Hope it helps....
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free
Enter text here...
Other Related Questions on trigonometry
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
trigonometry
1 Answer Available
Last Activity: 2 Years ago
Find the general solution of equation tan3∂=cot2∂For all angles between -720 and +720
trigonometry
0 Answer Available
Last Activity: 2 Years ago
To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA
trigonometry
0 Answer Available
Last Activity: 2 Years ago
cos^2 13ºcos^2 47º+cos^2 73º =? …..................
trigonometry
0 Answer Available
Last Activity: 2 Years ago
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
trigonometry
0 Answer Available
Last Activity: 2 Years ago