Find the value of expression 3[ sin 4((π/2)-α)+ sin -1(3 π-α)]-2[ cos 6(3 (π/2)+α)+ cos 6(5 π-α)]+6.

Question

Find the value of expression 3[ sin 4((π/2)-α)+ sin -1(3 π-α)]-2[ cos 6(3 (π/2)+α)+ cos 6(5 π-α)]+6. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

3[ cos 4 α+ sin 4 α]-2[ sin 6 α+ cos 6 α]+6 put α=90° =3-2+6=7

Q. Find the value of expression $3 [sin^{4} (\frac{π}{2} - α) + sin^{- 1} (3 π - α)] - 2 [cos^{6} (3 \frac{π}{2} + α) + cos^{6} (5 π - α)] + 6$ .