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Newest Equations and identities Questions

1. 1. For what values is the following equation true? sin(x+20)=cos(y−10)A. X=30 and y=60 B. X=30 and y=40 C. X=20 and y=50 D.
   1. 1 answer
   2. asked by goku
   3. 172 views
2. 1.Given that sin x=2/3 and x is an acute angle find without using calculator or mathematical tablea.tan x b.cos(90-x) 2.find the
   1. 1 answer
   2. asked by Jojo
   3. 232 views
3. a. Given that sin2 𝑥, cos2 𝑥 𝑎𝑛𝑑 5cos2𝑥 − 3sin2 𝑥 are in arithmetic progression, find the value ofi.
   1. 3 answers
   2. asked by Benny
   3. 189 views
4. If 13cos A=12,find the value of sec A + sin A
   1. 2 answers
   2. asked by Anonymous
   3. 355 views
5. Tan( theta) = 3/4 where pi<theta<3pi/2. Find the exact value of cos(2theta) using those values.
   1. 1 answer
   2. asked by Min
   3. 655 views
6. if sec theta*sin(36° + theta )=0 , find the value of theta so that theta and 36°+theta are acute angles
   1. 1 answer
   2. asked by Safi
   3. 913 views
7. if 3sin theta =2 and cos greater than 0,with the aid of a diagram determine the value of:a) tan theta b) sin theta/cos theta c)
   1. 1 answer
   2. asked by LERATO VINJWA
   3. 965 views
8. If sinx=3 cosx, then what is sinx∙cosx?
   1. 1 answer
   2. asked by Alexa
   3. 496 views
9. 1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B)2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2
   1. 1 answer
   2. asked by OwamIII
   3. 722 views
10. if tan 2x= -b/a, pi/2 <=2x<=pi, then determine an expression for sinx cosx in terms of a and b.*please show the calculation
    1. 1 answer
    2. asked by briane
    3. 826 views
11. sin(x+(pi/4))- sin(x-(pi/4))=11. Apply the sum and difference formulas for sine to simplify the left-hand side of the equation.
    1. 1 answer
    2. asked by Alisa
    3. 1,114 views
12. Given that csc θ = -4 and tan θ > 0, find the exact value ofa. x b. sin θ c. cos θ d. r e. sec θ f. cot θ
    1. 1 answer
    2. asked by Paula
    3. 644 views
13. if 5cos A plus 3=0 and 180<A<360..without using a calculator and with the aid of a diagram,determine the value of 1.1 sinA plus
    1. 1 answer
    2. asked by patience morakile
    3. 1,144 views
14. solve and round your answer to 4 dec.sinx= .4 in [0,2pi] secx= -3 in [0,pi]
    1. 0 answers
    2. asked by Kim
    3. 314 views
15. 1. Show that Sin3è - Cos2è = (1 - Sinè)(4Sin^2è + 2Sinè - 1).Without using a calculator, show that è = 18 degrees is an
    1. 3 answers
    2. asked by Edwards
    3. 734 views
16. If tanx=5/12 then what is sinx/2?
    1. 1 answer
    2. asked by Jon
    3. 1,118 views
17. q1) 2cos2x is f(x)-square root3 is g(x) solve f(x)-g(x)=0 to get points of intersection in x is between 0 and 180degrees q2) a)
    1. 2 answers
    2. asked by MR MATHEW MATICS
    3. 584 views
18. 4. Find the exact value for sin(x+y) if sinx=-4/5 and cos y = 15/17. Angles x and y are in the fourth quadrant.5. Find the exact
    1. 3 answers
    2. asked by Tiffany Enlow
    3. 3,970 views