PROOF =- - bc (1 – cos A) = - Use the Law of Cosines to prove that a-b+c a+b-c 2 2

Q: Express the number -5 in the form R(cos(0) + i sin(0)) = Reil where R>0 and 0 <0 < 2T.

A: rewrite -5 as -5=-5+0i comparing with z=a+bi a=-5 , b=0 R=a2+b2=-52+02=25+0=25=5 now…

Q: 5. Prove: tan²xsin²x = tan²x – sin²x

A:

Q: 8. If sinx = , x is in quadrant II, then the value of cos2x is %3D 17 b) -161 30 161 353 a) 289 c)…

A: Given : sin x = 817 x is in quadrant II.     To find the value of cos 2x.

Q: Verify the identity. (sec ² 0+1) (- sin² 0+1) = 2-sin ²0 20 rch Which of the following four…

A:

Q: Use trig identities to rewrite 1 1 f(v) 1 Cos 3v 1+ cos 3v - 1. f(v) = Csc 3v cot 3v 2. f(v) = 2…

A: Please refer the attached image for complete solution.

Q: (cos x +i sin a)" = cos nx +i sin na -1)

A:

Q: (co0s(-)) +- (cos(- 1. COS because 6. COS 6.

A:

Q: ∫0π/2[√(cos5t) sin5tdt] Hint: intergration by substitution

A: Rewrite the equation Apply substitution u=√(cos5t)

Q: SinA (1+cos A) = 2cosecA (+cos A) sin A

A:

Q: Multily    (a) (a+b)  2 (cos theta - sin theta ) 2

A:

Q: What is the equivalent expression of sin ( - x)+ sin ( +x)? O a) cos (z) O b) - 2 c) d) V2 cos (z)…

A: The given expression is sinπ4-x+sinπ4+x

Q: seelA-B)= cor(A+B) cos A-sin B

A: The objective is to prove, sec(A-B)=cos(A+B)cos2A-sin2B It is known that,…