1800-150-456-789
FlagBACK
Flag Trigonometry> What sign has sinx + cosx for x=140 degre...
question mark

What sign has sinx + cosx for x=140 degrees

Piyush Bokade , 9 Years ago
Grade 11
anser 1 Answers
Vaibhav Gupta

Last Activity: 9 Years ago

according to me...the sign should be positive...because 140 lies in second quadrant and sinx in second quadrant is +ve, also, sin x is increasing function and cox x is decreasing function.....therefore..the sign should be positive.
and also
according to calculator
sin 140 = 0.98023965944
cos 140 = -0.197813574
 
sin 140 + cos 140 = +0.78242608543
 
 

Provide a better Answer & Earn Cool Goodies

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Other Related Questions on trigonometry

question mark
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

question mark
  • Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
trigonometry
0 Answer Available

Last Activity: 2 Years ago

question mark
To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA
trigonometry
0 Answer Available

Last Activity: 2 Years ago

question mark
cos^2 13ºcos^2 47º+cos^2 73º =? …..................
trigonometry
0 Answer Available

Last Activity: 3 Years ago

question mark
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: 3 Years ago