annatoncheva11 annatoncheva11

04-05-2020
Mathematics

contestada

Can anyone help me on this task sin75°.cos75°=

Respuesta :

Chelboy Chelboy

04-05-2020

Answer:0.25

Step-by-step explanation:

Sin75.cos75

From trigonometric identity we know that: sin2x=2sinxcosx

sinxcosx=(sin2x) ➗ 2

Sin75cos75=(sin(2x75)) ➗ 2

Sin75cos75=(sin150) ➗ 2 but sin150=0.5

Sin75cos75=0.5 ➗ 2

sin75cos75=0.25

Answer Link

lucasella lucasella

04-05-2020

The answer is attached.

Ver imagen lucasella

Answer Link

Otras preguntas

Antonio sold skis for $220. His wholesale cost was $165. What was the percent markup?

Question4..........................

The purposes of a bar graph are to _[blank]_. Which options best complete the sentence? (Select all that apply.) A-visually depict the divisions of a whole B-v

SAT Math Question (Thanks!) f(x) = x^2 - 2x + 8 g(x) = -x^2 +18x +4 The two functions defined above are equal to each other when x=5+a or x=5-a, where a is a c

find the missing length with Mark with a question mark. part 2

Can someone help me ?

Calculate the mass of potassium sulphate required to prepare its 10% solution in 100g water.

Estimate the quantity of soil to be excavated from the borrow pit

A ball is thrown from an initial height of 3 meters with an initial upward velocity of 25 m/s. The ball's height (in meters) after t seconds is given by the fo

¿Dónde estaciones el coche? A. Salón b. estacionamiento C afeteria