1800-150-456-789
FlagBACK
Flag Trigonometry> If sec a.sin(36+a)=1 then find the value ...
question mark

If sec a.sin(36+a)=1 then find the value of a so that a and 36 +a are acute angles.Find a if sin 5a = cos 4a where 4a and 5a are acute angles. I will be highly obliged to for both the answers.

Vaibhav gupta , 7 Years ago
Grade 10
anser 1 Answers
Utsav Basu

Last Activity: 7 Years ago

Ans.: 1)   
     sec a * sin (36 + a) = 1
or, sin (36 + a) = cos a
or, sin (36 + a) = sin (90 – a)
or, 36 + a = 90 – a
or, a = 27
 
Ans.: 2)
     sin 5a = cos 4a
or, sin 5a = sin (90 – 4a)
or, 5a = 90 – 4a
or, a = 10
 
I hope I am able to answer your questions satisfactorily. Please approve my answers if so...

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 Years ago

question mark
\tFind 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: 2 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: 2 Years ago