Grade 12th passTrigonometry

Find sin(61) without a calculator.

1 Answer

You can do this by approximation method from the chapter Application of Derivatives.

f(x)=Sin x
x= 60
x+del.x=61
f(x+del x)= Sin 61

dy/dx= [f(x+delx)-f(x)]/[delx]
Cosx=[f(x+delx)-f(x)]/[delx]
And find f(x+del.x) from the eqn so formed

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View all Questions

Find sin(61) without a calculator.

Ayesha Khan

1 Answer

Ravi

Sec inverse x greater than or equal to pi/4 than x?

In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720

To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

Find sin(61) without a calculator.

Ayesha Khan

1 Answer

Ravi

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