Q9: 2 sin^x =1- cos 2x O True O False Q10: csc (x + 360) = cos x O True False

Q: 63)(10sx

A:

Q: 2 cos^2 x-sin x -1=0

A: 2cos2x-sinx-1=0⇒1-sinx-2sin2x=0⇒sinx=-1, sinx=12⇒x=3π2+2πn, x=π6+2πn, x=5π6+2πn

Q: find the value of sin^2(21degrees)+cos^2(21 degrees) - sin(70degrees)/cos(20degrees

A: the value of sin^2(21degrees)+cos^2(21 degrees) - sin(70degrees)/cos(20degrees

Q: Solve 3cos^2x=sin^2 on the interval [0,2pie]

A:

Q: is there a proof that cos^2t +sin^2t=x^2 + y^2 =1 ? if there is , how?

A: To prove the below statement Consider a right angle triangle as shown below

Q: What is the real number equivalent for sin ( Cos ^ -1 ( 1/2)) ?

A:

Q: Solve the following algebraically:  a) tan (theta)+cos(theta)/1+sin(theta)=sec (theta) b)…

A: a) Here we have to show that  tanθ+cosθ/1+sinθ=secθ Now here we use the formula tan(θ)=sin(θ)cos(θ)…

Q: . is cos(cos^-1 1.7=1.7 true?     2. is sin^-1 (sin80*)=80* true?

A: We know the basic relations      cos(cos-1x)=x Because cos and cos-1 are opposite functions,…

Q: Ísin^8 (3z) cos^5 (3z) dz * O 1/27 cos^9 (3z) - 2/33 cos^11 (3z) + 1/39 cos^13 (3z) + C O 1/27 sin^9…

A: Given integral I=∫ sin8(3z) cos5(3z)  dz

Q: csc² x+sec² x 1 cos² sin² 10

A: As we know from the trigonometric identity: 1). sinx=1cscx 2). cosx=1secx 3). sin2x+cos2x=1   Given:…

Q: (cos^4 x) - (sin^4 x) = cos2x   verify the identity

A: