Question #50d29 Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer P dilip_k Jun 30, 2016 If the question is as follows #(cos(-60)-tan(135))/(tan315+cos660)# #=(cos60-tan(2*90-45))/(tan(4*90-45)+cos(8*90-60))# #=(cos60-(-tan45))/(-tan45+cos60)# #=(1/2-(-1))/(-1+1/2)# #=(3/2)/(1/2)=3/2xx2/1=3# Otherwise if the question is as follows #cos(-60)-tan135/tan315+cos660# #=cos60-(tan(2*90-45))/(tan(4*90-45))+cos(8*90-60)# #=cos60-(-tan45)/(-tan45)+cos60# #=1/2-1+1/2=0# Answer link Related questions How do you find the trigonometric functions of any angle? What is the reference angle? How do you use the ordered pairs on a unit circle to evaluate a trigonometric function of any angle? What is the reference angle for #140^\circ#? How do you find the value of #cot 300^@#? What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#? How do you know if #sin 30 = sin 150#? How do you show that #(costheta)(sectheta) = 1# if #theta=pi/4#? See all questions in Trigonometric Functions of Any Angle Impact of this question 1279 views around the world You can reuse this answer Creative Commons License