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2017-06-21 15:19

23. Prove that (1+sin A)upon(1+cos A) + (1-sin A )upon(1-cos A ) = 2(cosec2A-cotA)

23. Prove that  (1+sin A)upon(1+cos A)  +  (1-sin A )upon(1-cos A )  = 2(cosec2A-cotA)

cos / (1 + sin) + (1 + sin) / cos = 2*sec

cos / (1 + sin) + (1 + sin) / cos = 2*sec

(1 - sin) / cos + cos / (1 - sin) = 2 * sec

(1 - sin) / cos + cos / (1 - sin) = 2 * sec

1 - sin^2(x) / (1 + cos(x)) = cos(x)

1 - sin^2(x) / (1 + cos(x)) = cos(x)

fun integral battle#2: a small sign makes a BIG difference!

fun integral battle#2: a small sign makes a BIG difference!

If cos(2θ)=1/3, then sin(θ)=?

If cos(2θ)=1/3, then sin(θ)=?

Find sin(a/2) and cos(a/2) given cosa

Find sin(a/2) and cos(a/2) given cosa

❤︎² Basic Trigonometry: Sin, Cos, Tan (mathbff)

❤︎² Basic Trigonometry: Sin, Cos, Tan (mathbff)

1 - cos^2/(1 + sin) = sin

1 - cos^2/(1 + sin) = sin

VWO5wisB_11_H7_6 Sin(A)=C en cos(A)=C met C = -1 0 1

VWO5wisB_11_H7_6 Sin(A)=C en cos(A)=C met C = -1 0 1

tan + cos/(1 + sin) = sec theta

tan + cos/(1 + sin) = sec theta

(Method 1) Integral of 1/(sin(x)cos(x)) (trigonometric identities + substitution)

(Method 1) Integral of 1/(sin(x)cos(x)) (trigonometric identities + substitution)

Sect 5 5 #40, Integral sin(x)/(1+cos^2(x))

Sect 5 5 #40, Integral sin(x)/(1+cos^2(x))

21. Prove that ( (1upon sin A) +(1upon tan A) )2 = (1+cos A )upon(1-cos A )

21. Prove that ( (1upon sin A) +(1upon tan A) )2 =  (1+cos A )upon(1-cos A )

(1 - sin)/(1 + sin) = (sec - tan)^2

(1 - sin)/(1 + sin) = (sec - tan)^2

1 / ( Cot A + Tan A ) = Sin A . Cos A

1 / ( Cot A + Tan A ) = Sin A . Cos A

Proof of Cos A + Cos B + Cos C = 1 + 4 Sin A/2 Sin B/2 Sin C/2

Proof of Cos A + Cos B + Cos C =  1 + 4 Sin A/2  Sin B/2  Sin C/2

sin[cos^-1(1/2)]

sin[cos^-1(1/2)]

Xn+1=sin(a*Yn)-cos(b*Xn)

Xn+1=sin(a*Yn)-cos(b*Xn)

sin(x) + cos(x) = 1 by Identities (Flawed)

sin(x) + cos(x) = 1 by Identities (Flawed)

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