97-100 - Sum-to-Product Formulas Use a Sum-to-Product Formula to show the following. 97. sin 130° – sin 110° = -sin 10° 98. cos 100° - cos 200° = sin 50° 99. sin 45° + sin 15° = sin 75° 100. cos 87° + cos 33° = sin 63°

Q: Find and explain  the errors that have been made

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Q: evaluate exactly cos-1(-3/2)

A: -3/2 lies outside the domain of the function. Hence we will have no solution

Q: sin(sin 1 + tan (-3))

A: find the explanation below

Q: sin120o = ..............,cos240 o =...................

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Q: sin(60°) = cos(60°) tan(60°) True False

A: I hope that it  will help you .Thankyou . Best regards.

Q: Solue [2 cos 0-31-5 from 0 02360°

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Q: Determine the six trigonometric function values for -405" sin(-405) csc(-405") V2 cos(-405 ) V2…

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Q: 3寸 Sin! (cos

A: sin-1cos3π4

Q: Use the fact that sin (38) 0.6157 to complete the expression. 22 cos() 0.6157

A: We have to use the fact  sin(38°) ≈ 0.6157 to complete the expression  cos(.... °) ≈ 0.6157

Q: prove the identity: 4 sin A cos^3A- 4 sin ^3A cos A

A: The first fill in the blank is wrong.

Q: Calculate given mathematical expression and input result in scientific notation using 3 significant…

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Q: Evaluate V2 cos sin-! 2.

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Q: Perform the indicated operation: 192 [ cos (196°) + i sin (196°) ]/ 16 [ cos (237°) +i sin (237°)1…

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Q: sin23 + cos23 = 1

A: Let us first find the value of sin23°+cos23° and then will check whether it's 1 or not.