1800-150-456-789
FlagBACK
Flag Trigonometry> How do I approach this question?
question mark

How do I approach this question?

Hemanth , 10 Years ago
Grade 11
anser 1 Answers
Kaustubh Nayyar

Last Activity: 10 Years ago

In these type of ques we have to change the given expression in terms of sin(2a) and cos(2a)
theta = 0 ( symbol not zero)
asin20 + bsin0.cos0 + ccos20 = a(sin20 + cos20) + bsin0.cos0 + (c-a)cos20
= a +( b/2) sin20 + (c – a)/2 cos20 + (c – a)/2
= b/2 sin20 + (c – a)/2 cos20 + (c+a)/2
Now Asinx + Bcosx lie between (A2 + B2)1/2    and – (A2 + B2)½
hence the expression will lie between   (a+c)/2 – 1/2(b2 + (c-a)2)1/2      and  
(a+c)/2 + 1/2(b2 + (c-a)2)1/2 

Provide a better Answer & Earn Cool Goodies

Enter text here...
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

Enter text here...

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 Year ago(s)

question mark
\tFind the general solution of equation tan3∂=cot2∂For all angles between -720 and +720
Trigonometry
0 Answer Available

Last Activity: 2 Year ago(s)

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

Last Activity: 2 Year ago(s)

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

Last Activity: 2 Year ago(s)

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: 2 Year ago(s)