Mathematics OpenStudy (anonymous):

cos φ = 4/5 with 0° < φ < 90° (a) sin 2φ OpenStudy (anonymous):

how do you solve this?? OpenStudy (anonymous):

i know the answe is 24/25 OpenStudy (anonymous):

how do you know the answer is 24/25? and what's with the a) (sin 2phi) ? OpenStudy (anonymous):

the a has no part in it OpenStudy (anonymous):

okay so do you want me to solve this algebraically or tell you how to solve it with a calulator? OpenStudy (anonymous):

actually i don't know if i know how to do with without a calculator lol OpenStudy (anonymous):

sin2phi=2sinphicosphi we are given cosphi=4/5 then sinphi=3/5 sin2phi=2*4/5*3/5=24/25 OpenStudy (anonymous):

cos φ = 4/5 with 0° < φ < 90° (a) sin 2φ lemme just use x instead of phi... sin2x = 2sinxcosx by the double angle formula.. Look at this triangle... |dw:1331633449765:dw| this triangle is made according to the given.. So sin2x=2*(3/5)*(4/5)=24/25

Latest Questions Jane2711: Here is another cover I did. (Flashlight - By: Jessie J) https://voca.ro/1j7plVZh
1 hour ago 4 Replies 0 Medals MochaBerries: So I asked @Elsa213 what color she wanted meh to do and she picked Blue-violet c:
1 minute ago 13 Replies 4 Medals urmom6969: how do I get rid of acne?
10 hours ago 5 Replies 1 Medal Maxb34: Suppose a normal distribution has a mean of 62 and a standard deviation of 4. What is the probability that a data value is between 56 and 64? Round your ans
11 hours ago 0 Replies 0 Medals lolokrat: f(x)=2x^2+3 and g(x)=x^3 what is g(f(x))? i know the answer is (2x^2+3)^3, but ca
9 hours ago 1 Reply 3 Medals deyluvphat: A white-tailed deer can sprint at speeds up to 30 miles per hour. American bison can run at speeds up to 3,520 feet per minute.
12 hours ago 2 Replies 2 Medals lolokrat: why would this be no solution? wouldn't x=3 be the solution?
11 hours ago 4 Replies 1 Medal kekeman: Which of the following situations would be useful for implementing a recursive function? A complex problem needs to be broken down into smaller, manageable
7 hours ago 2 Replies 1 Medal lolokrat: can someone pls explain to me the steps of this problem? where did the 9x and 2x
13 hours ago 15 Replies 3 Medals MoiraG: Which statements accurately describe the English colonies in North America? Choose all answers that are correct.
14 hours ago 1 Reply 0 Medals