Find the expression that is equivalent to sin 70° cos 20° + cos 70° sin 20°.

Q: cos -30° tan 90⁰

A:

Q: IT – sin 8. 2 Simplify cos - 8.

A: Given: (1)   cos2π8-sin2π8 (2)  2sin13∘ cos13∘

Q: The value of the expression cosec (75° +0)-sec (15° -0)- tan (55° +0)+ cot(35°-0) is

A: cosec75°+θ=sec90°-75°+θ=sec15°-θ

Q: The sine of 80° has the same value as sine of 100. O True O False

A:

Q: Find the exact value of the expression cos 5π/12 cos π/12 + sin 5π/12 sin π/12. Do not use a…

A: Let the given equation be y - y = cos5π12cosπ12+sin5π12sinπ12Let ,A = 5π12 and B = π12Then,y =…

Q: Determine if true sin 60°cos 45° +cos 60° sin 45° = sin 105

A: Given expression

Q: Simplify [2(cos 10 degree + i sin 10 degree )]5 . Give your answer in trigonometric form.

A: We have to simplify: 2cos 10°+i sin 10°5 We know from de Moivre's theorem, cos x+i sin xn=cos nx+i…

Q: Rewrite the expression tan x csc x cos x by changing to sines and cosines. Then simplify the…

A: Given expression is tanxcscxcosx.

Q: Which of the following is the simplified expression of 1- 1 sece sin²e cos²0 O tan²e O sec²9 cose?

A: