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trig need help with me. please!!

Consider the equation cos(4.38t)=0.1 Find the smallest positive solution in radians and round your answer to 4 decimal places

Find the exact value of each expression:\\ (a) sin-1(√(3)/2) = (b) cos-1(-1) =

Use the sum of difference formula to find the exact value

in triangle ABC a=3 b=5 and cos(C)= 13 what is the value of c

Help simplify the expression and show the steps too!

Multipulcation Rules and cconditional probability.   Thirty-five percent of people who own cell phones use their phones to send and receive text message. Choose 4 cell phones owners at...

Show that 2 tan20° + 4 tan40° + 8 tan 80° = 9(cot10° - tan10°).     Thank you :)

(i) Given that cos A =3/5 and cos(A+B) =-5/13, where A and B are acute, evaluate sin B.   (ii) Another acute angle C is such that sin C=12/13. Find sin(A+B+C).   (iii)...

Given that cotθ=k and that θ is acute, express tan3θ in terms of k.   Ans: (3k2-1)/(k)(k2-3)         Thank you :)

This is for my trig class, thanks for the help!

This is for my trig class. Thanks for the help!