In Problems 81–92, find the exact value of each expression. V3 81. sin 2 sin 82. sin 2 sin-! 2 83. cos 2 sin 84. cos 2 cos 85. tan 2 cos 86. tan 2 tan 87. sin 2 cos 88. cos 2 tan 89. sin 90. cos sin-! 91. sec 2 tan 92. csc 2 sin cos

Q: 10. Sec -405 degrees 12. Cot -90 degrees 14. cos 360 degrees  16. sin -225 degrees

A: 10)

Q: 2) DISCUSS The Contmuyo f Sin TX %3D

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Q: Arccos (sin ¹17) 6

A: Given Expression:The expression Aim:Evaluate the expression Concept used:The standard results for…

Q: 2) sin- 0 4) cos 6) cos-1 | V3 8) tan 3 -1 -1 10) cos

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Q: tan (sin-)

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Q: Evaluate ," S"(2 + sin 20) d®dr

A: Evaluate this integral by the procedure of multiple integration as in next step.

Q: now to get cos-1 value?

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Q: 1) cos²¹ (-²) == 2) arctan (-1) = (Cos-c2tant can -12-09-0 27 4) arcsec (2) (-4) arctanc-10-27 5)…

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Q: 2. Verify the identity:

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Q: 9) cos x = cos2x

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Q: 21

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Q: 13. In triangle ABC, suppose a = 8, b= 16, and angle C= 135°. Find side c %3D

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Q: Suppose that sin(0)=3/8. What cos(0)=_ Your Answer: . (round to 3 decimal places)

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Q: If cos x = 4/5, csc x < 0, then sin 2x cos2x = tan 2x

A: Cosx=4/5 ,cscx&lt;0

Q: 50. cos(27-0) = cos 0

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Q: 1) cos- 1 2 3) sin-1 V3 5) cos-.

A: As per our guidelines we are supposed to answer only first three parts.kindly repost others part as…

Q: 3) sin 0 = and < e <n. Evaluate sin 20 , cos 20 , and tan 20 2

A: sin theta=6/7

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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: 13 If sec0 5 Show that 2 sin 0-3cos0 3D3 4 sin 0 –9 cos0

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Q: 5 sin 0 – 4 cos 0 e of 5 sin 0 + 4 cos 0 is

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Q: The value of the expression cos a tan x – 4 + sin x + sec? a is O 8 tanx O -8 csC x 8 sec x

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